Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Cobie Smulders Robin Sherbatsky Actor Neil Patrick Harris Barney Stinson Actor Alyson Hannigan Lily Aldrin Actor Bob Saget Narrator Lyndsy Fonseca Daughter Guest Star David Henrie Son Guest Star Casey Wilson Kristen Guest Star Keegan-Michael Key Calvin Guest Star Marshall Manesh Ranjit Guest Star Joe Nieves Carl Guest Star Ned Rolsma Marcus Eriksen Guest Star Suzie Plakson Judy Eriksen Guest Star Brian Huskey Rand Guest Star Cherub Moore Hostess Guest Star Cristin Milioti Tracy McConnell Guest Star Carter Bays Executive Producer, Writer Craig Thomas Executive Producer, Writer Pamela Fryman Director