Denise Michelle Crosby is an American actress and model best known for portraying Security Chief Tasha Yar in Season One of Star Trek The Next Generation as well as Yars own daughter, the halfRomulan Commander Sela, in subsequent seasons. She is also known for her numerous film and television roles and for starring in and producing the film Trekkies. She is the paternal granddaughter of entertainer Bing Crosby.
Crosby was born in Hollywood, California, as the out of wedlock daughter of Marilyn Scott and actor Dennis Crosby. Her mother pursued a sensational, threeyearlong lawsuit against her father, at the conclusion of which he was ordered to pay child support and legal fees. This deeply embarrassed Dennis Crosby and his famous father, the actor and singer Bing Crosby. Although Bing died when his granddaughter was 19, the two never met.