Oct. 25 (UPI) -- Paul Dano says he's "so in love" with his newborn daughter.
"I'm so tired and I'm so in love," Dano told host Jimmy Fallon.
"It's so extreme. Your heart has gone like supernova in one sense," he added. "We landed from London last week and she cried for like 24 straight hours and you just kind of want to walk through a wall. It's crazy."
Dano and Kazan never publicly announced the actress' pregnancy. The couple have been together 11 years and co-starred in Meek's Cutoff, Ruby Sparks and Dano's new movie and directorial debut, Wildlife.
"Paul took one pass, and gave it to me for notes," Kazan told Page Six this month of working with Dano on the film.
"That wasn't a very happy note-giving experience. I said, 'I think for the sake of our relationship, you should just let me rewrite this.' And we traded it back and forth for about three years,'" she said of the process.