Alan Marshal (born Alan M Willey; 29 January 1909 – 9 July 1961) was an Australian-born actor who performed on stage in the United States and in Hollywood films. He was sometimes billed as Alan Marshall or Alan Willey.

Born Alan M Willey in Sydney, Australia, he was the son of popular Queensland stage actress Irby (Agnes) Marshal and English actor-producer Leonard Willey. The family left Australia in mid-1914, when he was five years old.

Willey and Marshal appeared in several Australian films made in 1912 – including The Strangler's Grip (1912) and The Mystery of the Black Pearl (1912), both directed by Franklyn Barrett.

Irby and Leonard continued their successful careers on the stage in the United States, first in San Francisco then in New York.

Alan reportedly first appeared on Broadway in The Swan (1923), at age 15 as "Alan Willey".

He went on to appear on Broadway as Stephano in The Merchant of Venice (1928), a production that also featured his father Leonard Willey as Antonio. Other Broadway stage productions he performed in include The Game of Love and Death (1929–30), Michael and Mary (1930), and Death Takes a Holiday (1931).

As "Alan Marshal", he had roles on Broadway in Foolscap (1933), Going Gay (1934), While Parents Sleep (1934), Lady Jane (1934), The Bishop Misbehaves (1935) and On Stage (1935).

According to his son, Kit, Marshal was spotted by a studio scout while performing in a play in New York and was asked to do a screen test for Selznick International Studios.