Denise Crosby

Denise Michelle Crosby (born November 24, 1957) is an American actress and model known for portraying Security Chief Tasha Yar mainly in season one of ''Star Trek: The Next Generation'', and Yar's daughter, the half-Romulan Commander Sela, in subsequent seasons. She is also known for her numerous film and television roles, and for starring in and producing the 1997 film ''Trekkies''. Provided by Wikipedia