Stephen Colbert, Allison Janney join 'Mr. Peabody & Sherman' voice cast Stephen Colbert and Allison Janney have joined the cast of the movie "Mr. Peabody & Sherman," Hollywood's DreamWorks Animation said Tuesday. Comedian Stephen Colbert in Washington, DC. UPI/Brendan Smialowski/Pool GLENDALE, Calif., June 12 (UPI) -- Stephen Colbert and Allison Janney have joined the cast of the movie "Mr. Peabody & Sherman," Hollywood's DreamWorks Animation said Tuesday. Also featuring the vocal talents of Ellie Kemper, Ariel Winter, Stephen Tobolowsky, Ty Burrell and Max Charles, the film is set for release Nov. 8, 2013. "These incredible casting additions have elevated 'Mr. Peabody & Sherman' to a new level of excitement and we are truly fortunate to work with so many talented actors," DreamWorks Animation Chief Creative Officer Bill Damaschke said in a statement. I'm certain that their collective passion and enthusiasm for the film will bring the classic characters of 'Mr. Peabody & Sherman' to new life and thrill audiences of all ages when we open in November of next year. Based on Jay Ward's classic cartoon, Mr. Peabody is the world's smartest person who happens to be a dog. When his "pet" boy Sherman uses their time traveling WABAC machine without permission, events in history spiral out of control to disastrous and comical results, a synopsis said.