Oscars 2015: How Stephen Hawking Reacted to Eddie Redmayne's Win for Best Actor

"The Theory of Everything" inspiration had some poignant words for the actor.

"Congratulations to Eddie Redmayne for winning an ?#?Oscar? for playing me in The Theory of Everything Movie," he wrote. "Well done Eddie, I'm very proud of you."

He signed the message "SH."

Redmayne won the big award -- and his reaction was priceless. He even interrupted his speech to pump his fist in excitement and yell "Wow!"

After the show, Redmayne told reporters backstage that he does plan to go and see Hawking and his family to celebrate after his epic win.