Judith Brenna Landon (February 26, 1928 – October 31, 2021) was an American actress and dancer who primarily played uncredited bit parts in films in the early 1950s, particularly a background dancer in movie musicals.

Particularly notable roles include Eras in the film Prehistoric Women (1950) and an uncredited but recognizable performance as the silent screen vamp Olga Mara in Singin' in the Rain (1952).

Prior to her film career she had danced with various theatrical groups including the Los Angeles Civic Light Opera.

[2] After her film career ended she made a few television appearances, including as a ballet teacher on an episode of The Brady Bunch, and an episode of her then husband Brian Keith's show Family Affair.

Judy Landon died in Thousand Oaks, California on October 31, 2021, at the age of 93.