"His entire relationship with me has been one long audition for Booksmartand he nailed it," Wilde jokingly told ET's Deidre Behar at the film's junket in Los Angeles about her longtime partner and father of her two kids' landing the role of Principal Brown in the buddy comedy.
As far as directing Sudeikis, Wilde admitted she wasn't able to "completely" brush off the personal and put on the professional hat with him, but it was "remarkable" watching him behind the monitor.
"There's still a shorthand that comes from being someone's closest partner, but I loved being able to just set him free because he's one of the best improvisers in the world," she expressed. "And I just loved that we got him to take this bit of information that we had in the script and run with it."
"And he gave us so much," Wilde continued. "We were dying laughing behind the monitor the whole time. I was like, 'This is remarkable.' Not many people can do that, and I loved in the scenes with him, our girls, our two leads, Beanie and Kaitlyn, they're just looking at him like, 'How is he doing that?'"
"I think for every working mother, that's the balance: Figuring out how much you can bring your kids to work and how much it will distract you," she explained. "And I know there's a lot of mom guilt out there, thinking about, 'Shouldn't I be able to do it all at the same time and do it all perfectly?' And you can't. It's a balance."
"I shot four weeks of nights on Booksmart. I would come home at 7 a.m., get the kids up, make them breakfast, get them ready, take them to school, and then melt, just collapse," Wilde recalled. "That's not something I could do for a sustained period of time, but for this moment, I was like, 'This is my dream come true. I get to direct a movie, I'm going to give it my all and make it work.'"