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 Spencer Pratt Spencer Pratt Guest Star Heidi Montag Heidi Montag Guest Star Kim Kardashian Kim Kardashian Guest Star Kendra Wilkinson Kendra Wilkinson Guest Star Jack J. Bennett Craig Gerard Guest Star Ambrit Millhouse Jill Guest Star Kevin Kirkpatrick Donald Guest Star Jason Rogel Clerk Guest Star Ethan Dizon Ben Guest Star Greg Collins Matt Zinman Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Kourtney Kang Writer Pamela Fryman Director