TV Jason Sudeikis Leaving 'SNL' By Raphael Chestang 2:55 PM PDT, July 24, 2013 CBS After 10 years with the show, Jason Sudeikis is leaving Saturday Night Live. So, who's going to impersonate Vice President Joe Biden now?!"I'm definitely done," Sudeikis, 37, announced on Wednesday night's Late Show with David Letterman (WATCH). "I'm not coming back next fall."RELATED: Jason Sudeikis Leaving SNL?The We're the Millers star spent two years as a writer before joining the cast of NBC's long-running sketch show.Sudeikis explained that his decision to leave the show hasn't had a chance to really sink in yet, but he expects to feel the difference when the show comes back from hiatus without him."I'll start to get that itch probably in August when all these sketch ideas will show up," said Sudeikis, who joked that he might be tempted to turn a three-minute sketch idea into a 90-minute movie.The actor joins the mass exodus that most recently includes Bill Hader and Fred Armisen.In May, fellow cast member Jay Pharoah tweeted a farewell to Hader, Armisen and Sudeikis that was quickly deleted.Watch the entire interview tonight on Late Show at 11:35/10:35c on CBS.