Christina "Tina" Malone (born 30 January 1963) is an English actress, writer, director, and producer, best known for playing Mimi Maguire in the Channel 4 series Shameless. She also played Mo McGee in Brookside and a nurse called Bobbie in Victoria Wood's dinnerladies. She made a reality appearance in Celebrity Big Brother 6 in January 2009 and a guest appearance in The Chase Celebrity Special in 2013.