If ever there was a crossover with Barbenheimer, this is it: actor Cillian Murphy, star of the blockbuster "Oppenheimer," says he is open to playing Ken in "Barbie 2." Murphy's "Oppenheimer" and "Barbie," starring Margot Robbie and Ryan Gosling, couldn't be more different films, but each was a huge success at the box office this weekend. [Murphy, who played the titular character in Christopher Nolan's film, asked, "Will I play Ken in 'Barbie 2'? Let's read the script and discuss."

As for Greta Gerwig's "Barbie," Murphy said, "I can't wait to see it. 'I can't wait to see the movie. I think it's great for cinema. There are so many great movies coming out this summer."

Murphy may be on board as Ken, but not all of them were originally. Allison Jones, Barbie's casting director, told "Vanity Fair" that Dan Levy, Bowen Yang, Ben Platt, and others almost became Ken, but it didn't work out: "They were, no joke, really disappointed that they couldn't." Jones spoke, noting that Barbie's three months on set in London made it impossible for the three actors to participate in the film. She also revealed that Jonathan Groff was in negotiations to play Alan, but the role eventually went to Michael Cera.

"Dear, dear Jonathan Groff was like, 'I can't believe I'm typing this, but I can't do Alan,'" Jones said.

In addition to Gosling and Serra, the Kens were played by Sim Liu, Nukuchi Gatwa, John Cena, and Kingsley Ben Adir.

And Robbie, who plays the main character in that film, did not rule out the possibility of a Barbie 2: "I think it would be a bit of a trap to try to make the first one while also planning a sequel," she told TIME magazine, but also admitted to having discussions about another cinematic experience for the iconic doll I think it would be a bit of a trap," she told TIME magazine.

And the world clearly wants more: Barbie made history this weekend, grossing $155 million on its opening weekend. Variety reported that this is the largest debut for a female-directed film in history. Oppenheimer earned a staggering $80.5 million in its opening weekend.

"I think it's great for the industry and for audiences to have two great films by great filmmakers opening on the same day," Murphy said. 'I could spend all day in the cinema. What could be better than that?