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 Joe Nieves Carl Guest Star Ben Koldyke Don Frank Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Theresa Mulligan Rosenthal Writer Pamela Fryman Director