Mary T. Quigley is a costume designer and producer, known for The Big Bang Theory, Two and a Half Men and Roseanne. She started in the entertainment industry as a costumer and later a costume supervisor in Roseanne from 1990 to 1997. Quigley has been a costume designer for both Two and a Half Men and The Big Bang Theory since 2003 and 2007 respectively. Both shows were co-created by Chuck Lorre. She also works as a co-producer for both shows.