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.