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 Sergey Brusilovsky Sergei the Tailor Guest Star Caroline Lagerfelt Bridal Shop Lady Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Pamela Fryman Director Maria Ferrari Writer