The Saturday Night Live veteran will replace Jimmy Fallon when he takes over The Tonight Show next year.
Both of these hit IFC series will return with all-new episodes in January of 2012.
Inglourious Basterds star Til Schweiger also joins Garry Marshall's latest star-studded holiday-themed project.
Seth Meyers also joins Sarah Jessica Parker in the adaptation of the Allison Pearson comic tale.
Amy Poehler and her cast and crew talk about the hit NBC series.