Boyhood, which starred Ethan Hawke, Patricia Arquette and Ellar Coltrane has won the Bafta best film award and best director for Richard Linklater.
Eddie Redmayne was given the leading actor honour for his role in The Theory of Everything which was also named outstanding British film.
Former Bafta president and filmmaker Lord Attenborough, who died last year, was remembered with tributes from the Duke of Cambridge and actor Robert Downey Jr at the ceremony tonight.
The Duke described him as "inclusive" and "a leader with a vision" and praised his "passion for nurturing, supporting and developing talent".
He said: "I hope that everyone who watches his films and learns about him as a person will be encouraged to follow his example."
Downey Jr, who played the title role in Attenborough's film Chaplin, said: "I'm sad. I miss you Dickie."
US actresses including Leading Actress award winner Julianne Moore chose to wear British designers at tonight's Baftas.
The British Academy Film Awards, better known as the Baftas, are being held tonight. Here are some key figures about the ceremony.
Jack O'Connell from Derby and Felicity Jones from Birmingham are hotly tipped for BAFTA success tonight.