Robert Downey, Jr. was announced to voice Mr. Peabody, but in March 2012, he got replaced by Ty Burrell. Max Charles, the actor who plays young Peter Parker in The Amazing Spider-Man will voice Sherman. In June 2012, it was reported that Mr. Peabody & Sherman's release date has been moved up to November 8, 2013, replacing another DreamWorks Animation's film Me & My Shadow. Stephen Colbert will voice Paul Peterson, Mr. Peabody's nemesis, Allison Janney will voice Peterson's wife, Paula, and Ariel Winter their daughter Penny. Also joining the cast are Ellie Kemper and Stephen Tobolowsky. The film will feature Mr. Peabody, a talking dog who is the smartest being in the world, and his "pet" boy Sherman. When Sherman's use of their time traveling WABAC machine results in disastrous and comical results, it is up to them to put things on track before the space-time continuum is irreparably destroyed.