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There's a reason the chemistry between Keanu Reeves and Sandra Bullock in "Speed" was so damn convincing: Turns out the two actors were crushing on each other in real life. Except neither one let on at the time.

While promoting "John Wick: Chapter 3 — Parabellum" on the Ellen DeGeneres show, the host put Reeves on the hot seat about Bullock.

She ran a clip from December 2018 of Bullock admitting that being around Reeves made her giggly: "I’m thinking of how sweet Keanu Reeves was, and how handsome he was. It was hard, it was hard for me to really be serious," she said.

Reeves admitted he had no idea his costar she had a crush on him, adding, "She obviously didn’t know I had a crush on her either. It was nice to go to work, she’s such a wonderful person and a wonderful actress."

So why didn't they get together? "We were working," a slightly flustered Reeves answered.

When DeGeneres asked Bullock, the actress replied, “Never dated him," adding that's probably why they've been friends for so long.

The two reunited for the 2006 drama "The Lake House," and Reeves said he'd love to work with her again.

"John Wick 3" is now playing. And "Speed" is probably playing somewhere on cable TV right now.

[Via People]