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 Lyndsy Fonseca Daughter Guest Star Sarah Chalke Stella Zinman Guest Star Darcy Rose Byrnes Lucy Zinman Guest Star Michael Kagan Joel Adams Guest Star Shammy Dee Matisse Guest Star Edward Kiniry-Ostro Brian Guest Star Elaine Kao Girl From Couple Guest Star John Pollono Guy From Couple Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Greg Malins Writer Pamela Fryman Director