(1940) The Mortal Storm

as Professor Victor Roth

(1939) The Wizard of Oz

as Professor Marvel / The Wizard of Oz

(1940) The Shop Around the Corner

as Hugo Matuschek

(1936) Dimples

as Eustace Appleby

(1936) The Great Ziegfeld

as Billings

(1937) Rosalie

as King Fredrick Romanikov

(1949) The Stratton Story

as Barney Wile

(1948) Summer Holiday

as Uncle Sid

(1945) Yolanda and the Thief

as Victor Budlow Trout

(1943) Thousands Cheer

as Dr. Frank Morgan

(1940) Broadway Melody of 1940

as Bob Casey

(1933) Bombshell

as Pops Burns

(1938) Sweethearts

as Felix Lehman

(1946) Courage of Lassie

as Harry MacBain

(1935) Naughty Marietta

as Gov. Gaspar d'Annard

(1937) Saratoga

as Jesse Kiffmeyer

(1943) The Human Comedy

as Willie Grogan

(1935) The Good Fairy

as Konrad

(1944) Casanova Brown

as Mr. Ferris

(1944) The White Cliffs of Dover

as Hiram Porter Dunn

(1937) The Emperor's Candlesticks

as Colonel Baron Suroff

(1937) The Last of Mrs. Cheyney

as Lord Francis Kelton

(1940) Boom Town

as Luther Aldrich

(1941) Honky Tonk

as Judge Cotton

(1918) The Knife

as Dr. Robert Manning

(1933) Broadway to Hollywood

as Ted Hackett

(1942) Tortilla Flat

as The Pirate

(1932) The Half-Naked Truth

as Merle Farrell

(1934) The Cat and the Fiddle

as Jules Daudet

(1917) The Light in Darkness

as Ramsey Latham

(1942) White Cargo

as The Doctor

(1949) Any Number Can Play

as Jim Kurstyn

(1933) Hallelujah, I'm a Bum

as Mayor John Hastings

(1947) Green Dolphin Street

as Dr. Edmond Ozanne

(1937) Sunday Night at the Trocadero

as Frank Morgan

(1940) The Ghost Comes Home

as Vernon 'Vern' Adams

(1950) Key to the City

as Fire Chief Duggan

(1924) Born Rich

as Eugene Magnin

(1939) Balalaika

as Ivan Danchenoff

(1934) The Affairs of Cellini

as Alessandro, Duke of Florence

(1935) The Perfect Gentleman

as Major Horatio Chatteris

(1933) Luxury Liner

as Alex Stevenson

(1946) The Cockeyed Miracle

as Sam Griggs

(1933) The Nuisance

as Dr. Buchanan Prescott

(1939) Broadway Serenade

as Cornelius Collier, Jr.

(1949) The Great Sinner

as Aristide Pitard

(1945) The Great Morgan

as Himself

(1936) Piccadilly Jim

as James Crocker, Sr. / Count Olav Osric

(1941) The Wild Man of Borneo

as J. Daniel 'Dan' Thompson

(1933) The Kiss Before the Mirror

as Paul Held

(1938) Port of Seven Seas

as Panisse

(1932) Secrets of the French Police

as François St. Cyr

(1930) Laughter

as C. Mortimer Gibson

(1930) Dangerous Nan McGrew

as Doc Foster

(1935) Escapade

as Karl

(1943) A Stranger in Town

as John Josephus Grant

(1936) Trouble for Two

as Colonel Geraldine

(1935) Enchanted April

as Mellersh Wilkins

(1933) Reunion in Vienna

as Dr. Anton King

(1936) Dancing Pirate

as Mayor Don Emilio Perena

(1939) Henry Goes Arizona

as Henry Conroy

(1933) When Ladies Meet

as Rogers

(1930) Queen High

as George Nettleton

(1934) There's Always Tomorrow

as Joseph White

(1935) I Live My Life

as G.P. Bentley

(1940) Hullabaloo

as Frankie' Merriweather

(1934) A Lost Lady

as Daniel Forrester

(1934) By Your Leave

as Henry Smith

(1934) Success at Any Price

as Raymond Merritt

(1946) Lady Luck

as William Audrey

(1937) Beg, Borrow or Steal

as Ingraham Steward

(1938) Paradise for Three

as Rudolph Tobler

(1930) Fast and Loose

as Bronson Lenox

(1938) The Crowd Roars

as Brian McCoy

(1941) Washington Melodrama

as Calvin Claymore

(1917) A Modern Cinderella

as Tom

(1948) The Three Musketeers

as King Louis XIII

(1942) The Vanishing Virginian

as Robert Yancey

(1924) Manhandled

as Arno Riccardi

(1940) Keeping Company

as Harry C. Thomas

(1925) Scarlet Saint

as Baron Badeau

(1933) Best of Enemies

as William Hartman

(1935) Lazybones

as Tom

(1974) That's Entertainment!

as (archive footage) (uncredited)

(2000) The Dark Side of the Rainbow

as Professor Marvel (archive footage)

(1927) Love's Greatest Mistake

as William Ogden

(1917) Raffles, the Amateur Cracksman

as Bunny Manders

(1940) Hollywood: Style Center of the World

as Self

(1944) Kismet

as Narrator (voice)

(1990) Myrna Loy: So Nice to Come Home To

as (archive footage)

(1944) Twenty Years After

as (archive footage)

(1925) The Crowded Hour

as Bert Caswell

(1917) Baby Mine

as Alfred

(1933) The Billion Dollar Scandal

as John Dudley Masterson

(1930) Belle of the Night

as ---

(1917) Who's Your Neighbor?

as Dudley Carlton

(1916) The Suspect

as Sir Richard

(1917) The Girl Philippa

as Halkett

(1919) The Golden Shower

as Lester

(1925) The Man Who Found Himself

as Lon Morris

(1990) The Wonderful Wizard of Oz: The Making of a Movie Classic

as Self (archive footage)

(1916) The Daring of Diana

as John Briscoe

(1918) At the Mercy of Men

as Count Nicho

Oz

as Self / The Wizard (archive footage)