Happy birthday to the one and only Jason Ritter! Can you believe you're already turning the big 4-5? It seems like just yesterday that you were a fresh-faced teenager on "Parenthood." But now, you've matured into a talented actor and all-around awesome human being. Here's to another year of laughter, love, and epic performances. And remember, age is just a number, so go out there and rock it like a boss! Cheers to you, birthday boy!