
Henry O'Neill (1891–1961) was an American film actor known for playing gray-haired fathers, lawyers, and similarly roles during the 1930s and 1940s.
O'Neill began his acting career on the stage, after dropping out of college to join a traveling theatre company. He served in the military in World War I, then returned to the stage.
In the early 1930s he began appearing in films, including The Big Shakedown, Santa Fe Trail, Anchors Aweigh, The Green Years, and The Reckless Moment. His last film was The Wings of Eagles.
Henry O'Neill died in 1961 at the age of 69.

Jezebel
1938 · as General Theopholus Bogardus

Special Agent
1935 · as District Attorney Roger Quinn

Juarez
1939 · as General Miguel Miramon

Road Gang
1936 · as George Winston

Dodge City
1939 · as Colonel Dodge

Marked Woman
1937 · as Arthur Sheldon

The Human Comedy
1943 · as Charles Steed

They Drive by Night
1940 · as District Attorney (uncredited)

Anchors Aweigh
1945 · as Admiral Hammond

Santa Fe Trail
1940 · as Cyrus Brody

The Green Years
1946 · as Canon Roche

Bullets or Ballots
1936 · as Ward Bryant

Wonder Bar
1934 · as Richard

The Wings of Eagles
1957 · as Capt. Spear

This Man's Navy
1945 · as Lt. Cmdr. Roger Graystone

The Walking Dead
1936 · as District Attorney Werner

Midnight
1934 · as Edgar V. Ingersoll

The Go-Getter
1937 · as Commander Tisdale