Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Neil Patrick Harris Barney Stinson Actor Alyson Hannigan Lily Aldrin Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator David Henrie Son Guest Star Cristine Rose Virginia Mosby Guest Star Lyndsy Fonseca Daughter Guest Star Harry Groener Clint Guest Star Suzie Plakson Judy Eriksen Guest Star Gary Anthony Williams Inspector Guest Star Koby Rouviere 10-Year-Old Marshall Guest Star Marianne Muellerleile Meredith Guest Star Thomas Crawford Wedding Guest 1 Guest Star Kathleen M. Darcy Wedding Guest 2 Guest Star Cinda Adams Wedding Guest 3 Guest Star Jim Grollman Uncle Larry Guest Star Linda Porter Muriel Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Chris Harris Writer Pamela Fryman Director