Moyer MacClaren Bupp (January 10, 1928 – November 1, 2007) professionally known as Sonny Bupp, was an American child film actor and businessman. His most notable film was Citizen Kane (1941), in which he appears as Junior, Charles Foster Kane III, the eight-year-old son of Charles Foster Kane and his first wife, Emily. Bupp was the last surviving credited member of the Citizen Kane cast at his death.
1942Eyes of the UnderworldMovieas Student Fighting with Mickey1941One Foot in HeavenMovieas Boy (uncredited)1941All That Money Can BuyMovieas Martin Van Buren Aldrich (uncredited)1941Sergeant YorkMovieas Boy in Sunday School (uncredited)1941Bad Men of MissouriMovieas Young Grat1941Citizen KaneMovieas Charles Foster Kane III1940Three Faces WestMovieas Billy Welles1940Queen of the MobMovieas Newsboy1940Half a SinnerMovieas Willy
1940Little OrvieMovieas Freddie Jackson (uncredited)1940Abe Lincoln in IllinoisMovieas Willie Lincoln (uncredited)
1940Parole FixerMovieas Bobby Mattison
1940Emergency SquadMovieas Peter
1939No Place to GoMovieas Thomas "Tommy" M. Foster
1939The Day of RestMovieas Younger Son1939When Tomorrow ComesMovieas Boy Hiding from Policeman (uncredited)
1939Renegade TrailMovieas Joey Joyce1939On Borrowed TimeMovieas Boy in Tree (uncredited)1939Fixer DuganMovieas Boy Chiseler
1939Sudden MoneyMovieas Billy1939Boy TroubleMovieas Chester Platt
1938Men in FrightMovieas Sonny the Kid in Hospital (uncredited)
1938Penrod's Double TroubleMovieas Monk (uncredited)
1938Hunted MenMovieas Smallest G-Men Club Member · as Boy
1937Missing WitnessesMovieas Little Boy (uncredited)
1937Love Is on the AirMovieas Billie - Boy on Radio Program1937My Dear Miss AldrichMovieas Boy Asking for Rabbit (uncredited)1937Cash and CarryMovieas Jimmie (uncredited)
1937Michael O'HalloranMovieas Sarge (uncredited)1937You Can't Buy LuckMovieas Orphan Boy (uncredited)1937The Great O'MalleyMovieas Boy with Lollipop (uncredited)1937We Who Are About to DieMovieas Hit-and-Run Victim (uncredited)
1936What Becomes of the Children?Movieas Little Freddy Worthington
1936And Sudden DeathMovieas School boy
1936Man HuntMovieas Young Boy (uncredited)