Shirley Henderson (born 24th November 1965) played Ursula Blake in Love & Monsters.
Among her non-Who roles, she appeared as Moaning Myrtle in several of the Harry Potter films, including Harry Potter and the Goblet of Fire which also co-starred David Tennant. She also co-starred in the mid-1990s TV series Hamish Macbeth, and in Trainspotting as Spud's girlfriend, Gail.