Alyson Hannigan

HOW I MET YOUR MOTHER (CBS) - Neil Patrick Harris ("Harold & Kumar Go to White Castle") and Jason Segel ("Freaks and Geeks") have both joined the cast of the comedy pilot, about the exploits of a single man (Josh Radnor), as told through his own eyes 20 years later. They’ll play Barney and Marshall respectively in the 20th Century Fox Television-based project, which also stars Alyson Hannigan. Carter Bays, Craig Thomas and Rob Greenberg are the executive producers.