Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Alyson Hannigan Lily Aldrin Actor Neil Patrick Harris Barney Stinson Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator David Henrie Son Guest Star Lyndsy Fonseca Daughter Guest Star Ashley Williams Victoria Guest Star Katie Walder Shannon Guest Star Mark Derwin Greg Guest Star Suzie Plakson Judy Eriksen Guest Star Marshall Manesh Ranjit Guest Star Michael McNeely Screaming Boy Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Chris Harris Writer Pamela Fryman Director