Sandra Bullock is spilling the beans about her crush on former costar Keanu Reeves.

The Bird Box actress, 54, confessed during her appearance on The Ellen DeGeneres Show on Thursday that her Speed costar got her heart beating a little faster.

“I think of how sweet Keanu Reeves was and how handsome he was,” Bullock told Ellen DeGeneres, while swooning slightly at a throwback still from the 1994 film.

The Oscar-winning actress admitted it was difficult to act alongside Reeves, also 54, throughout filming.

“It was hard for me to like, really be serious,” Bullock explained. “Like, he would look at me and I’d be like [giggles]. And I’d have to try to, you know [be serious].”

While the actress may have had a slight difficulty remaining in character, she said the John Wick actor remained completely dedicated to preserving her dignity.

“My dress sort of kept flying up — I said, ‘Whatever you do, just keep my dress down.’ The whole stunt he just made sure of my dress,” she said. “He was very sweet.”

When DeGeneres asked if the two ever got together, Bullock said, “Never dated him.”

“There’s just something about me that I guess he didn’t like!” she joked, as the host added, “He was probably intimated.”

Bullock disagreed. “Not at all. There’s nothing to intimidate,” she said. “But I think we’re probably friends for that long because we didn’t [date].”

In the film, Reeves played police officer Jack Traven who must prevent a bomb from exploding aboard a city bus by keeping its speed above 50 mph with the help of a passenger, Annie (Bullock).

Reeves told PEOPLE in 2017 he wanted to reunite with Bullock onscreen. The two also starred in the 2006 romantic drama The Lake House.

“Oh my gosh, yeah I’ve been trying,” the actor said. “I’ve been looking for [film projects] with Sandra — not with her, but for us.”

He added, “I haven’t found anything yet. I’ve been trying!”