
From Wikipedia:
Kathleen Key (April 1, 1903 – December 22, 1954) was an American actress who achieved a brief period of fame during the silent era. She is best remembered for playing Tirzah in the 1925 film Ben-Hur. Key was the great-great granddaughter of Francis Scott Key, composer of "The Star Spangled Banner", and a distant cousin of author F. Scott Fitzgerald.
Born Kitty Lanahan in Buffalo, New York, she debuted in films in 1920 in the film The Jackeroo of Coolabong, playing a lead role. From that point on to the end of the 1920s, Kathleen Key, sometimes credited as Kathleen Keys, starred in several films, but never really reached stardom, and was never given much credit for the roles she had, although there were some exceptions.
In the early '20s, Key had a well-known love affair with silent-film actor Buster Keaton, who was married at the time. As told in Keaton's biography, the actor attempted to call off the relationship, but Key flew into a jealous rage and ransacked his MGM dressing room, which caused her to be virtually blacklisted afterward by the movie industry. It is also stated that Keaton refused to give Key a monetary loan. A telegram, sent by one of Keaton's friends who had heard about the argument, comically read: "Congratulations. Hear you are off Key."
After her retirement in 1936, Keys spent the rest of her days in moderate comfort at the Motion Picture Country House in Woodland Hills, California, where she died at the age of 51 in 1954. Her interment was located at Valhalla Memorial Park Cemetery.

The Big Parade
1925 · as Miss Apperson (uncredited)

Ben-Hur: A Tale of the Christ
1925 · as Tirzah

Golf Widows
1928 · as Ethel Dixon

The Phantom of the North
1929 · as Colette

The Trouble Shooter
1924 · as Nancy Brewster

The Four Horsemen of the Apocalypse
1921 · as Georgette (uncredited)

Reno
1923 · as Yvette - The Governess

A Lover's Oath
1925 · as Sherin

Irish Hearts
1927 · as Clarice

North of Hudson Bay
1923 · as Estelle MacDonald

Klondike Annie
1936

1925 Studio Tour
1925 · as Self

Thunder in the Night
1935 · as Party Guest

The Rendezvous
1923 · as Varvara

Under Western Skies
1926 · as Milly Lewis

Bells of San Juan
1922 · as Florrie Engel

The Rookie's Return
1920 · as Gloria

The Desert's Toll
1926 · as Muriel Cooper