Denise Michelle Crosby 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, including The Walking Dead, Ray Donovan, Southland, Creepshow, Suits, General Hospital, How to Get Away with Murder, The Magicians, Prison Break, Man Men, Dexter, The X-Files, and Scandal,  and for starring in and producing the film Trekkies.