Day, who stars in the FX sitcom It's Always Sunny in Philadelphia, will make his hosting debut Nov. 5. He'll be joined by musical guest Maroon 5, returning for a third appearance. Gym Class Heroes frontman Travie McCoy will perform alongside the group for their hit song "Stereo Hearts."
Stone will have her second turn hosting Nov. 12 with musical guest Coldplay (the act's fourth appearance). Stone, who recently starred in The Help and Crazy, Stupid, Love can be seen next in The Amazing Spider-Man.