Watch Ethan Hawke and Jimmy Fallon Sing Lullabies in the Style of Bob Dylan

He wowed critics in Boyhood and just directed a documentary, but now Ethan Hawke is showing off another, completely different talent: impersonating Bob Dylan on The Tonight Show.

Hawke, like host Jimmy Fallon, is a father to young children. And sometimes, when your kids don’t go to sleep when they’re supposed to, you have to get a little creative—perhaps by singing classic songs in the style of the folk icon. “I’ve heard there’s scientific research that points to this,” Fallon says. “Oh, it’s proven,” Hawke answers before the two break out their guitar gravelly-voiced renditions of “Rock-a-bye Baby” and “Twinkle, Twinkle, Little Star.”

Watch the full clip below: