Gertrude Astor (Born Gertrude Eyster November 9, 1887 – November 9, 1977) was an American motion picture character actress, who began her career playing trombone on a riverboat.

Born in Lakewood, Ohio, Astor at the age of 12 ran off and joined a woman's band as a trombone player and toured the states. In New York she left the band to obtain film work and got a job as an extra before her career took off. Astor was a prolific performer, between 1915 and 1962 she appeared in over 250 movies. Her first known credit is in a Biograph short in 1915. She then became a contract player at Universal. A tall, angular and beautiful woman, Astor frequently towered over the leading men of the era; thus, she was most frequently utilized in comedy roles as aristocrats, golddiggers and "heroine's best pal".