Brooklyn has been named Outstanding British Film at the Baftas in London.
The film, staring Saoirse Ronan and Domhnall Gleeson, was based on a novel by Colm Toibin.
Brie Larson was named leading actress for her role in Room, a part-Irish production directed by Dubliner Lenny Abrahamson, about a mother and her young son who are held captive.
Leonardo DiCaprio was named the best actor at the awards ceremony for his role in The Revenant.
The American star was the firm favourite for the prize, with even his British rival Eddie Redmayne tipping him to get the trophy.
DiCaprio thanked his mother and said he was "absolutely honoured by this award".
"As an actor I've been influenced by so many British actors. I want to thank one particular British actor and that is Mr Tom Hardy
"Of course, Alejandro, thank you for becoming a great friend."
DiCaprio beat Redmayne, who was nominated for The Danish Girl, as well as Michael Fassbender, Matt Damon and Bryan Cranston.
The Revenant was also named best film and Mexican Alejandro G Inarritu won the best director prize.
The film, which was made in freezing conditions in Canada and Argentina, was also recognised for its cinematography.
Kate Winslet has won best supporting actress for her performance in Steve Jobs.
The win follows her success at the Golden Globes last month.
She beat Alicia Vikander (Ex Machina), Julie Walters (Brooklyn), Jennifer Jason Leigh (The Hateful Eight) and Rooney Mara (Carol).
Eddie Redmayne presented Winslet with the award who said: "Oh my gosh - what an incredible year to be nominated. It's been an extraordinary year for women, I really am quite overwhelmed.
"Michael Fassbender you lead us through this - you are an extraordinary actor."
Mark Rylance, who stars in Bridge Of Spies, was victorious in the best supporting actor category.
The film's director Steven Spielberg collected the award on his behalf as Rylance is performing in an off-Broadway play.
Star Wars: The Force Awakens, which was nominated for four awards, won the trophy for special visual effects.
One of the film's stars John Boyega, who plays Finn, won the Rising Star award, beating competition from Dakota Johnson, Bel Powley, Brie Larson and Taron Egerton. The award was the only one voted for by the public.
Boyega revealed he is due to start filming Episode VIII on Monday morning and is being collected at 6am so may have to curtail the partying.
George Miller's Mad Max: Fury Road took away the make up and hair, costume and production design and editing trophies at the Royal Opera House.
Sidney Poitier won the BAFTA Fellowship Award but could not be at the event due to ill-health.
Instead, the award was presented to him on screen by actor Jamie Foxx and Poitier's daughter. The 88-year-old described it as an "extraordinary moment".
Inside Out won the prize for best animated film.
Film-maker Asif Kapadia said of Amy after it won best documentary: "In the end it was all about Amy. We really fell in love with her when making the film. And our aim and mission was really to try and tell the truth about her."
Stars featured in the event's In Memoriam segment included Alan Rickman, Sir Christopher Lee, Maureen O'Hara, Omar Sharif and David Bowie.
Angels Costumes, a British costume supplier which has provided clothes for some of the most successful films in history including Star Wars, Titanic and Lawrence Of Arabia won the award for Outstanding British Contribution to Cinema.
