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 Danica McKellar Trudy Guest Star Joanna Leeds Jane Guest Star Carter Bays Executive Producer, Writer Craig Thomas Executive Producer, Writer Pamela Fryman Director