He also finds himself falling in love with a 19-year-old student, played by the wise-beyond-her-years Elizabeth Olsen. The movie was acquired by IFC on Wednesday.
In an interview with TheWrap, Radnor talks about his choices as a filmmaker, and how he balances his television work on "How I Met Your Mother" with his true love, filmmaking.
"I leave myself open to the charge that, 'Oh it’s not realistic, because there’s a strain of optimism, and it’s not cynical enough.' It might just be something in me - that I’m constitutionally an optimist, and I can’t find a way to shake that."
He won't apologize for that. Or for preferring filmmaking to being on TV.
“’How I met Your Mother’ feels like my wife," he said. "And making movies feels like my mistress.”