Winning an Oscar wasn't the only surprise for Jennifer Lawrence at the Academy Awards Sunday night. As the Best Actress winner began her interview with "Good Morning America" co-host George Stephanopoulos, actor Jack Nicholson popped into the exchange.

Lawrence had just described her big win: "I feel like I can't even remember. It's kind of an insane moment and it was just really exciting. It was really just shocking. It was the first time I've ever felt, like, actual shock."

Out of nowhere, Nicholson, 75, walked into the interview and said to Lawrence, "You did such a beautiful job. I didn't mean to cross into your interview but I had to congratulate you."

"You're being really rude," Lawrence, 22, joked after thanking him.

They gushed over each others' movies and said goodbye.

He exited and the actress shouted, "Oh my God," putting her hands in her face. "Is he still there?"

"I'll be waiting," said Nicholson, who popped his head back into the interview as a surprise.

Lawrence had never met Nicholson before. Then she waved to actress Jennifer Garner, wife of Best Picture winner Ben Affleck.

After Lawrence's big award, "The Hunger Games" actress is going to have to get used to her new friends.

"This is my life now. 'Hey Jack, hey Jennifer, how are you?'" she said, jokingly.