Eddie Redmayne has vowed to take his Oscar trophy to Cambridge to show Professor Stephen Hawking.
The Theory Of Everything star, whose latest win tops off huge critical acclaim for his portrayal of Hawking, said he is inspired by him.
Speaking backstage after the ceremony in Los Angeles, Redmayne said: "For Stephen Hawking, the illness was of little interest to him. He lives forward, passionately."
On making the movie, he said: "When I watch a film, I believe what I see on screen. We felt a responsibility to tell their story."
The 33-year-old joked that the best actor win will give him some peace of mind about his future career.
"I've always had to fight for jobs. Retaining employment will keep me very happy," he said.
Robert DeNiro claimed it was he who gave the young actor his big break.
Redmayne starred alongside Matt Damon and Angelina Jolie in the 2006 movie The Good Shepherd.
Director DeNiro tweeted: "Congratulations Ed on your best actor Oscar, it was I that gave you your big break in The Good Shepherd, we all knew!"
Emma Watson, Redmayne's co-star in My Week With Marilyn, wrote: "So thrilled for Eddie!"
The British Film Institute tweeted: "Congratulations to Eddie Redmayne for winning best actor for his performance in The Theory of Everything."