Sandra Bullock says Channing Tatum's improvised lines in a 'Lost City' scene had to be cut because she was laughing so hard

• Channing Tatum improvised lines for a "Lost City" scene, and his costar Sandra Bullock loved it.
• "None of his lines were used because I was laughing so hard," Bullock told Insider.

Sandra Bullock revealed in a new interview with Insider that Channing Tatum's ad-libbed lines during one scene in "The Lost City" caused her to laugh so hard, the takes couldn't be used in the final cut.

"There's a scene where they have to get me to a car. He and that other actor — I can never remember his name, he's got blond hair," Bullock quipped of the scene involving Tatum and their blond costar, Brad Pitt.

In the scene, Tatum and Pitt (who play Alan and Jack in the film, respectively) arrive at the tropical mansion of an an eccentric billionaire (played by Daniel Radcliffe) to rescue Bullock's character Loretta, a romance novelist who's been kidnapped. The two then transport Loretta (still bound to a chair) through the jungle to a waiting getaway car, all while being chased by the billionaire's evil goons.

"The directors had Channing ad-lib lines to us, and none of his lines were used because I was laughing so hard," Bullock told Insider at the SXSW red-carpet premiere of "The Lost City" in Austin, Texas on Saturday, March 12.

"He's crazy funny," the actress said of Tatum, adding that while Tatum's ad-libbed lines were "stupid," they still made her laugh.

And according to Bullock, filmmakers have Tatum's hilarious lines (which included, per Bullock: "When the shepherd goes to pie, you eat it") in outtakes.

Bullock also joked on the red carpet that she cleans Keanu Reeves' house "once a week," when asked by Insider about her friendship with her "Speed" costar.

"I clean his house every Thursday. It's sort of a thing that we had. I lost a bet when we did 'Speed,' and I said, 'Well, if it's not true, I'll clean your house,'" the "Blind Side" actress quipped. "I think I've done a pretty good job. I mean, I stay out of certain rooms, but I respect it."

"Other than cleaning his house on Thursdays, I see him maybe once or twice a year," Bullock told Insider.

"The Lost City" hits theaters March 25. You can watch the trailer below.