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 Chris Elliott Mickey Aldin Guest Star Christina Pickles Rita Guest Star Bill Fagerbakke Marvin Eriksen Sr. Guest Star Suzie Plakson Judy Eriksen Guest Star Robert Michael Ryan Marvin Eriksen Jr. Guest Star Ned Rolsma Marcus Eriksen Guest Star Jack Walsh Morris Guest Star Piper Mackenzie Harris Eleven-Year-Old Lily Guest Star Greg Lewis Mr. Ossias Guest Star Krys Marshall Bridesmaid Guest Star Marion Kerr Whitney Guest Star Dennis W. Hall Leopold Guest Star Charles Rahi Chun Mr. Park Guest Star Doris Usui Korean Woman Guest Star Jonathan Morgan Heit Boy 1 Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Jamie Rhonheimer Writer Pamela Fryman Director