Reeves told host Ellen DeGeneres he wasn't aware of Bullock's crush while filming the 1994 movie. He said he also had feelings for Bullock on set.
"She obviously didn't know I had a crush on her, either," Reeves said. "We were working."
"It was nice to go to work. I mean, she's such a wonderful person and a wonderful actress," he added.
Bullock recalled her crush on Reeves during the Dec. 20 episode of The Ellen DeGeneres Show.
"I think of how sweet Keanu Reeves was and how handsome he was," the actress said of filming.
"It was hard for me to like, really be serious," she added. "Like, he would look at me and I'd be like [giggling]. And I'd have to try, you know, [to be serious]."
Reeves jokingly proposed a Speed sequel with Bullock in an interview with The Big Ticket podcast this week. Reeves and Bullock played Jack Traven and Annie Porter in the movie.
"We'll be 65!" Reeves said. "I'm driving [or] Annie's driving because I don't remember where I am."
Reeves stars in the new movie John Wick: Chapter 3 - Parabellum, which opened in theaters Friday. Bullock last appeared in the Netflix film Bird Box.