Margaret "Maggie" O'Neill (born 15 November 1962) is an English actress. She is known for her television roles in Peak Practice (2000–2002), Shameless (2004–2007) and EastEnders (2008). In 1986 she appeared in the music video for Simply Red's single "Holding Back The Years". In 1988, she appeared in the film Gorillas in the Mist.