Scarlett Johansson made a rather surprising joke about her husband Colin Jost.

The actress appeared on "The Tonight Show" starring Jimmy Fallon to promote her new film "Fly to the Moon," and the host asked exactly how Jost came to have a cameo in the film.

"Our director, Greg Berlanti, is a big fan of Colin, and I think he had to do it because it's kind of our prenup," Johansson said, drawing laughter from the audience. 'If I ask him to do something, he has to be there to support me. He has to be in every one of my movies. I see.

Fallon then asked Johansson if she would be doing the lines with Jost at home, since Jost is also an actor (although he is known primarily as a comedian), and she explained that he is not necessarily the best person for the job.

"I do the lines with him, which is great, and you would find it very useful to have a partner there to help you memorize lines and stuff for tomorrow," the Black Widow star said. "He really focuses on reading the lines, but it's not always the kind of performance I want ....... I'm like, 'Say your lines!' ' It's like that."

"Fly to the Moon," which opens July 12, stars Johansson alongside Channing Tatum, Woody Harrelson, Jim Rash, and Ray Romano. Johansson plays an advertising executive and Tatum a NASA employee.

Johansson and Jost attended the film's premiere in New York City on July 8, where the actress's look was inspired by the 1960s. She wore a gingham two-piece for the occasion, consisting of a crop top and a long straight-lined skirt.

They married in October 2020 and had their first child, a boy named Cosmo, in August 2021.