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 Joe Nieves Carl Guest Star Nicholas Roget-King Doug Guest Star Monique Edwards Producer Guest Star Emmitt Smith Emmitt Smith Guest Star John Ducey Kevin Guest Star Robert Michael Morris Lou Guest Star Charlene Amoia Wendy Guest Star Lou Bonacki Older Guy Guest Star Carter Bays Executive Producer, Writer Craig Thomas Executive Producer, Writer Rob Greenberg Director