The voice of Ratatouille's Remy was provided by Patton Oswalt.
Patton Peter Oswalt ( born January 27 , 1969 ) is an American stand-up comedian , writer , actor , and voice artist , known for roles such as Spencer Olchin in the sitcom The King of Queens ( 1998 -- 2007 ) , voicing Remy in the film Ratatouille ( 2007 ) , and playing multiple identical brothers , the Koenigs , on Agents of S.H.I.E.L.D. ( 2014 -- 17 ) . Ratatouille (film) . The film stars the voices of Patton Oswalt as Remy , an anthropomorphic rat who is interested in cooking ; Lou Romano as Linguini , a young garbage boy who befriends Remy ; Ian Holm as Skinner , the head chef of Auguste Gusteau 's restaurant ; Janeane Garofalo as Colette , a rôtisseur at Gusteau 's restaurant ; Peter O'Toole as Anton Ego , a restaurant critic ; Brian Dennehy as Django , Remy 's father and leader of his clan ; Peter Sohn as Emile , Remy 's older brother ; and Brad Garrett as Auguste Gusteau , a recently deceased chef .