Yorgos Lanthimos's period comedy The Favourite emerged as the favourite at the 72nd British Academy Film Awards ceremony on Sunday by scoring seven wins from 12 nominations.
The drama took the top prize of Best Film, as well as the honors for Best Director, Best Foreign Language Film and Best Cinematography.
Winners relished the symbolism of their victories.
Australians Fiona Crombie and Tony McNamara were among the award-winners in the haul for The Favourite, the biggest victor at this year's BAFTAs.
Cuaron thanked Netflix for getting behind the film, which is in Spanish and has garnered 10 Oscar nominations, including for Best Picture, a major recognition for the streaming service.
"To see a film about an indigenous domestic worker embraced this way in an age when fear and anger propose to divide us means the world to me", Cuaron said as he accepted the Best Film prize.
Colman - who rose to fame playing Sophie Chapman in Peep Show - paid tribute to her "classiest and coolest" fellow co-stars in the film, Rachel Weisz and Emma Stone, and said in her eyes, the award was for all three of them as leads, and that she would "scratch in" their names on the Bafta statuette too.
"This is for all three of us", Colman said, speaking of Weisz and the film's other star, Emma Stone.
Rami Malek won the best actor award for his performance as Freddie Mercury in Bohemian Rhapsody.
Mahershala Ali took the Supporting Actor prize for his role in Green Book, set in the segregated U.S. South in the early 1960s.
A Star Is Born won for its original music, with the film's writer, director, star and composer Bradley Cooper collecting the prize.
The awards, known as BAFTAs, will be scoured for clues on who might triumph at Hollywood's Academy Awards on February 24. "Roma" and "The Favourite" each have 10 Oscar nominations.
The main difference with the Oscars is that at the British awards, real royalty mixes with the Hollywood variety.
They included the Duke and Duchess of Cambridge, who attended in the Duke's capacity as president of Bafta.
"Absolutely Fabulous" star Joanna Lumley was the gently risque host.
The superhero blockbuster Black Panther won the award for Best Special Visual Effects (Geoffrey Baumann, Jesse James Chisholm, Craig Hammack, and Dan Sudick). The London-raised actress spoke of her own past struggles with depression and urged others not to give up.
Laura Whitmore provides red-carpet glamour.
Malek thanked Dexter Fletcher, the director who was brought on for the last weeks of filming after Bryan Singer was dropped. Singer, who was sacked while "Bohemian Rhapsody" was in mid-production in 2017, denies the allegations.
A British wing of the "Times's Up" campaign founded a year ago is vowing to keep the campaign going and to double the number of women in film, on and off screen.
However, there was disappointment for Irish actors Barry Keoghan and Jessie Buckley, both of whom were nominated for the rising star award.
"It needs to be 50 percent", said Harris, who called the gender imbalance an industry-wide problem. "Men seem to find that transition much easier".