Heder, 29, gained fame playing the memorable goofball Napoleon Dynamite in the 2004 film of the same name.
Will Ferrell added some funny thoughts:
"I think Jon will make a great father. He's a good listener, and he likes children, that's important. You should like children to be a father."
Ferrell is speaking from experience. "I mean, I found that out the hard way, 'cause I hate children, and now I've got two," he says. "But I love them, 'cause they're my children, but...."