BAFTA winner Allison Janney has defended the Duchess of Cambridge's decision to wear green to the event instead of black, saying she is "an extraordinary woman and she can wear whatever she wants to wear".
While the majority of those attending the British Academy of Film and Television Awards on Sunday night opted to take part in the red carpet black out to raise awareness for the Time's Up campaign against sexual harrassment, Kate wore a green dress instead, due to royal protocol.
When asked about Kate's outfit, Janney, whose performance in I, Tonya earned her an award for Best Supporting Actress at the ceremony, said she would "never judge anyone's choice".
Allison Janney in I, Tonya
"I would never judge anyone's choice. She looked absolutely beautiful and I'm so happy for them that she's pregnant again," Janney said of the royal.
"She's an extraordinary woman and she can wear whatever she wants to wear."
There had been much speculation in the build-up to the event about what colour Kate would wear.
As a member of the royal family, Kate is not allowed to make a political statement, and while the Time's Up campaign is not a political topic, wearing black would have seen her make a public stand on the issue.
Kate Middleton and Prince William on the BAFTA red carpet
See the BAFTA red carpet action as it happened
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Is Allison Janney the only woman in Hollywood whose roles have actually got better with age?
When Allison Janney was 17, she ran through a plate glass door. “I was at a friend’s party in Dayton, Ohio, where people were playing this crazy balloon game outside,” she says. The object of the game, explains the 58-year-old actress and seven-time Emmy Award winner, was to pop the balloons attached to people’s feet; Janney was cheating by putting the balloons up by her knees.
“I was wearing a strapless dress that people kept stepping on and I remember feeling terrified that I was going to expose myself, so I ran to go inside and didn’t see the sliding doors…” She lost three quarters of her blood...
She scooped a coveted Best Supporting Actress trophy for her lauded efforts in the critically-acclaimed biopic I, Tonya at Sunday night's BAFTAs.
And Allison Janney was clearly in the mood to celebrate when she made her way to the afterparty - held at London's Grosvenor House - with her award still in hand.
The 58-year-old actress hammed it up for the cameras as she posed at the entrance to the bash, which was attended by an equally exuberant Gary Oldman, 59, also bearing his gong after winning the Leading Actor prize for Darkest Hour.
We like to party: Allison Janney, left, and Gary Oldman, right, led the arrivals at the BAFTA afterparty, held at London's Grosvenor House on Sunday night
They led a host of stars who made their way over to the upscale hotel after a celebratory night at the nearby Royal Albert Hall, where the awards gala was held.
But while the show applauded the best in film, it also served to mark a serious subject, as the large majority of attendees arrival in black ensembles while standing in solidarity with the Time's Up movement.
The Time's Up initiative sent around a letter urging guests 'to wear black to the awards ceremony, to follow suit from our sisters who attended the Golden Globes'.
Celebratory mood: After scooping the Best Supporting Actress gong for her efforts in I, Tonya, the 58-year-old actress was clearly in a celebratory mood
Miles of smiles: The US star flashed a broad smile as she proudly clutched her covered prize
Black and gold: She made a glam arrival at the party, stepping out in a black and gold gown
Just a month ago, most of the stars who attended the Golden Globes wore black in a show of solidarity towards victims of sexual harassment.
And while the dress code was looser for the Grammys, stars walked the red carpet carrying white roses in support of gender equality.
Hofit lead the star-studded arrivals the BAFTA after-party, where winners Allison Janey and Gary Oldman proudly showed off their new accolades.
Allison turned heads as she arrived in an unconventional black dress, which featured a gold neckline.
Joyful: After winning the Leading Actor prize for Darkest Hour, Gary was also in goos spirits
Cradle: He cradled his metallic trophy in his arms as he made his way into the star-packed bash
It's good to talk: The London-born screen star stopped outside the party to talk to the press
Tux: The actor looked stylish in a classic black tuxedo, which he wore with a crisp white shirt
making waves: The star waved at onlookers as he made his way into the exclusive gathering
Party people: He was followed by a large group of guests who were ready to let their hair down
The long gown's gold neckline was attacked to her sleeves, which the bare centre have the look of a large cut-out.
Lupita Nyong'o, Naomie Harris and Karen Gillan all graced the after party red carpet following the awards ceremony in their stunning black ensembles, as well as couple Kate Mara and Jamie Bell.
Sophie Cookson flaunted her incredible leggy frame in arrived in a semi-sheer black lace gown with feather accented bustier.
The stars turned out in force at the 2018 BAFTA award ceremony earlier in the evening, held at the Royal Albert Hall in London for the second year in a row, after the move from the Royal Opera House.
On the list: Margot Robbie was also among the attendees who made their way to the bash
Sheer: The Australian beauty wowed in a black embroidered gown with a semi-sheer overlay
Wow: Lupita Nyong'o looked sensational in a sleeveless black gown with an angular silhouette
Jet-setter: Lupita jetted in from South Africa, where she'd attended a Black Panther premiere
Nine-times BAFTA-nominated Three Billboards Outside Ebbing, Missouri took home an incredible five awards at this year's EE British Academy Film Awards.
The stars turned out in force for the award ceremony on Sunday, held at the Royal Albert Hall in London, to see Three Billboards be the first to take home an award, scooping the Best British Film gong.
Screenwriter Martin McDonagh - who took home another award for the movie, this time for Best Original Screenplay - joined producer Graham Broadbent on the stage, with McDonagh joking that he’s half Irish so he’s not allowed to make the speech.
Pals: Gemma Arterton made an arrival with former sewing machine operator Gwen Davis
Pretty in pleats: The brunette beauty looked stunning in a floor-length pleated black gown
Steps: She walked a few steps behind her new friend as they prepared to enter the venue
Broadbent then said: 'We finished this film about a year ago about a woman taking on the establishment. It seems more timely now than it did then with Times Out. It turns out meaningful change can happen quickly if we put our minds to it.'
The movie's next gong went to Sam Rockwell for his Supporting Actor role in the movie.
To his co-star, lead actress Frances McDormand he said: 'Frances you're the rock. You make me proud to be an actor.'
He was sure to thank his 'friend, Alan Rickman' adding: 'I'll see you in the bar!'
Screenwriter: Helena Bonham Carter made her way to the party with screenwriter James Ivory
Colleagues and friends: James, who has worked with Helena on A Room With A View and Howard's End, looked dapper in a black suit and bow tie
EE British Academy Film Awards 2018 - THE WINNERS BEST FILM: Three Billboards Outside Ebbing, Missouri OUTSTANDING BRITISH FILM: Three Billboards Outside Ebbing, Missouri DIRECTOR: The Shape Of Water - Guillermo Del Toro LEADING ACTRESS: Frances McDormand - Three Billboards Outside Ebbing, Missouri LEADING ACTOR: Gary Oldman - Darkest Hour SUPPORTING ACTRESS: Allison Janney - I, Tonya SUPPORTING ACTOR: Sam Rockwell - Three Billboards Outside Ebbing, Missouri EE RISING STAR AWARD: Daniel Kaluuya OUTSTANDING DEBUT BY A BRITISH WRITER, DIRECTOR OR PRODUCER: I Am Not A Witch FILM NOT IN THE ENGLISH LANGUAGE: The Handmaiden DOCUMENTARY: I Am Not Your Negro ANIMATED FILM: Coco Original ORIGINAL SCREENPLAY: Three Billboards Outside Ebbing, Missouri ADAPTED SCREENPLAY: Call Me By Your Name ORIGINAL MUSIC: The Shape Of Water - Alexandre Desplat C INEMATOGRAPHY: 'Blade Runner 2049' - Roger Deakins EDITING: Baby Driver - Jonathan Amos, Paul Machliss PRODUCTION DESIGN: The Shape Of Water - Paul Austerberry, Jeff Melvin, Shane Vieau COSTUME DESIGN: Phantom Thread - Mark Bridges SOUND: Dunkirk - Richard King, Gregg Landaker, Gary A. Rizzo, Mark Weingarten SPECIAL VISUAL EFFECTS: Blade Runner 2049 - Gerd Nefzer, John Nelson BRITISH SHORT ANIMATION: Poles Apart BRITISH SHORT FILM: Cowboy Dave MAKEUP & HAIR: Darkest Hour
McDormand beat Annette Bening [Film Stars Don’t Die In Liverpool], Margot Robbie [I, Tonya], Sally Hawkins [The Shape Of Water] and Saoirse Ronan [Lady Bird] to scoop the Lead Actress award of the night.
In her speech, she referenced the fact she was not wearing an all-black ensemble, much like her fellow actresses who were supporting the Time's Up initiative.
'I have a little trouble with compliance. But I want you to know that I stand in full solidarity with my sisters tonight in black.
Glamorous: Cressida Bonas still looked as glamorous as ever as she arrived at the big bash
Lovely layers: The ex-girlfriend of Prince harry wowed as she arrived in a layered black dress
Upbeat: Rochelle Humes appeared to be in decidedly good spirits as she entered the bash
'I appreciate a well-organised act of civil disobedience. I am thrilled that activists all over the world have been inspired by Three Billboards.
'When I was a young actor I was told I wasn’t gifted and would need to work on it... so I did. I am deeply grateful for the writers for helping me reach my potential. Power to the people!'
The movie then took the Best Film prize, with McDormand, Broadbent, Mcdonagh back on stage, alongside producer Pete Czernin.
It beat Call Me Your Name, Darkest Hour, Dunkirk and The Shape Of Water.
Taking the plunge: Florence Pugh looked stylish in a strappy deeply plunging black gown
Gary Oldman took the Lead Actor prize for his role as Winston Churchill in Darkest Hour, beating Daniel Day-Lewis [Phantom Thread], Daniel Kaluuya [Get Out], Jamie Bell [Film Stars Don’t Die In Liverpool] and Timothée Chalamet [Call Me By Your Name].
'Tonight is even more special because I can share it with my three sons and my beautiful wife Giselle,' the actor said. '
Speaking to director of Darkest Hour Joe Wright, he said: 'You handpicked an armada of talent. I love you Kristen [Scott Thomas] and Lily [James].
That's a quick change! Hofit Golan slipped into an all-black ensemble with daring thigh-high slit for the exclusive gathering - hours after arriving at the main awards show in a silver dress
Smiles: Hofit appeared in good spirits after her potentially controversial wardrobe moment earlier in the evening, swapping out her minimalist jewelry for chic golden chandelier earrings
'Last but not least I want to thank Winston, the man himself. He held the line of honour and freedom and integrity for his nation. Thank you Sir Winston and thank you BAFTA.'
Alison Janney took home the Best Supporting Actress award for her role in I, Tonya as Tonya Harding's mother.
'I want to thank BAFTA and clear up a lie,' she said. 'I did not graduate from the Royal Acadmay of Dramatic Art - but I did do a two-week summer programme there - that's probably why I'm here tonight!'
Arriving in style: Saoirse Ronan swept into the party in style in a mix-texture semi-sheer gown
Shimmering: Isabelle Huppert put her best sartorial foot forward in a black sequinned gown
Neckline: Karen Gillan turned heads in an open-fronted black gown with a sheer neckline
Call Me By Your Name took home the gong for Best Adapted Screenplay. Acclaimed American screenwriter James Ivory, 89, looked dapper in a black suit and bow tie as he collected the accolade.
'I've been here before but never by myself and never for writing a screenplay,' he said in his acceptance speech. 'We are wonderfully lucky to have the actors we have - some of whom are here now.'
He was presented with the award by 2015 Rising Star nominee Margot Robbie, who is nominated in this year's Best Actress category for I, Tonya and Octavia Spencer, who received a nod in the Best Supporting Actress group for The Shape of Water.
So in love: Kate Mara and her husband Jamie Bell remained close to one another at the party
Fitted: British screen star Chiwetel Ejiofor attached a Time's Up badge to his well fitted suit
Couple: TV personality Dermot O' Leary and his wife Dee Copping also put in an appearance
Big trophies: Rungano Nyoni, left, and Emily Morgan, right, toted BAFTA awards at the bash
Host Joanna Lumley joked 'Please welcome my niece Margo Robbie' as she introduced the award.
Listing the former winners of the award - such as Will Poulter, Tom Holland and Kristen Stewart - Spencer remarked: 'This tells us that the British public would make pretty excellent casting directors.'
Emotional Kaluuya praised his fellow Rising Star nominees in his poignant speech as well as thanking his acting mentors and his family for letting him 'think different.'
Delightful: Naomie Harris looked sensational in trousers with a patterned semi-sheer dress
Eye-catching: Emma Roberts caught the eye as she arrived in a deeply plunging black dress
Broad smile: Caitriona Balfe smiled broadly as she strolled over to the celebratory gathering
He said: 'I've gone blank. Thank you, Tessa, Tim, Josh and Florence. I feel so privileged to be in your guys' company. I am a product of arts funding in the UK.
National treasure Joanna Lumley - who has this year taken the hosting reigns over from Stephen Fry - had the audience immediately eating from the palm of her hand as she took part in a pre-show skit, leaving the celeb-packed audience in hysterics.
Stephen Fry announced he was stepping down after hosting for 12 years, from 2001 to 2006 and again from 2012 to 2017. TV presenter Jonathan Ross presented during the intervening years.
Jumpsuit: Millie Mackintosh stepped out in a plunging jumpsuit for her big night on the town
Pretty in pink: Frances McDormand arrived wearing a pink coat over her bright patterned dress
Silver: Actress Gugu Mbatha-Raw looked effortlessly stylish in her silver-tinged black gown
Strike a pose: Annette Benning, left, and Celia Imrie, right, posed up a storm at the gathering
Lumley said at the time: 'Honestly how exciting is this? It's just so unbelievably thrilling. I always looked at the BAFTA Awards with Stephen Fry there forever more, so who thought I'd turn into Stephen Fry? I said yes indecently quickly. Thank you, thank you, I'll see you on the night.
And after stepping down from his coveted position, Fry said: 'Every one of the 12 BAFTA film award ceremonies that I had the privilege of hosting has a place in my memory.
The first BAFTA award ceremony took place in 1949 and presented the initial awards for films made in 1947 and 1948.
Dapper gents: Nicholas Hoult, left, and Will Poulter, right, arrived at the party looking dapper
Playful: Willem Dafoe got playful as he posed for photographers gathered outside the bash
Daring: Anya Taylor Joy opted for quite the daring ensemble for her night out on the town
Wrapped: Laura Bailey staved off the wintry chill in a faux fur stole as she arrived at the bash