What was Cecil DeMille's last film?

Answer 1

as director - from imdb.com # The Ten Commandments (1956) # The Greatest Show on Earth (1952)

... aka Cecil B. DeMille's The Greatest Show on Earth (USA: complete title)

# Samson and Delilah (1949)

... aka Cecil B. DeMille's Samson and Delilah (UK: complete title) (USA: complete title) # California's Golden Beginning (1948) # Unconquered (1947) # The Story of Dr. Wassell (1944) # Reap the Wild Wind (1942) (as Cecil B. De Mille)

... aka Cecil B. DeMille's Reap the Wild Wind (USA: complete title) # North West Mounted Police (1940)

... aka Northwest Mounted Police

... aka The Scarlet Riders

# Union Pacific (1939) # The Buccaneer (1938) # The Plainsman (1936) # The Crusades (1935) # Cleopatra (1934) # Four Frightened People (1934) # This Day and Age (1933) # The Sign of the Cross (1932) (as Cecil B. De Mille) # The Squaw Man (1931) (as Cecil B. De Mille)

... aka The White Man (UK) # Madam Satan (1930)

# Dynamite (1929) # The Godless Girl (1929) # Walking Back (1928) (uncredited) # The King of Kings (1927) # The Volga Boatman (1926) # The Road to Yesterday (1925) # The Golden Bed (1925) # Feet of Clay (1924) # Triumph (1924) # The Ten Commandments (1923) # Adam's Rib (1923) # Manslaughter (1922) # Saturday Night (1922) # Fool's Paradise (1921) # The Affairs of Anatol (1921) (uncredited)

... aka A Prodigal Knight (UK) # Forbidden Fruit (1921) # Something to Think About (1920) # Why Change Your Wife? (1920)

# Male and Female (1919) # For Better, for Worse (1919) # Don't Change Your Husband (1919) # The Squaw Man (1918) # Till I Come Back to You (1918) # We Can't Have Everything (1918) # Old Wives for New (1918) # The Whispering Chorus (1918) # The Devil-Stone (1917) # Nan of Music Mountain (1917) (uncredited) # The Woman God Forgot (1917) # The Little American (1917) (uncredited) # A Romance of the Redwoods (1917) # Lost and Won (1917) (uncredited) # Joan the Woman (1917) # The Dream Girl (1916) # Maria Rosa (1916) # The Heart of Nora Flynn (1916) # The Trail of the Lonesome Pine (1916) # The Golden Chance (1915) # Temptation (1915) # The Cheat (1915) (uncredited) # Chimmie Fadden Out West (1915) # Carmen (1915/I) # Kindling (1915) # Chimmie Fadden (1915) # The Arab (1915) # The Wild Goose Chase (1915) # The Captive (1915) # The Unafraid (1915)

... aka The Unexpected (USA: review title) # The Warrens of Virginia (1915) # After Five (1915) # The Girl of the Golden West (1915) # The Ghost Breaker (1914) # Rose of the Rancho (1914) # The Man from Home (1914) # What's His Name (1914) # The Virginian (1914) # The Call of the North (1914) # The Man on the Box (1914) (co-director) (uncredited) # The Only Son (1914) # The Master Mind (1914) (uncredited) # Brewster's Millions (1914) # The Squaw Man (1914) (uncredited)

... aka The White Man (UK)

Answer 2

DeMille's last film as director-producer was The Ten Commandments (1956), which was not a remake of his 1923 silent film with the same title as often stated. He supervised The Buccaneer (1958), which was directed by Anthony Quinn, DeMille's son-in-law.