Sharon Marguerite Gless (born May 31, 1943) is an American actress, who is known for her television roles as Maggie Philbin on Switch (1975–78), Sgt. Christine Cagney in the police procedural drama series Cagney & Lacey (1982–88), the title role in The Trials of Rosie O'Neill (1990–92), Debbie Novotny in the Showtime cable television series Queer as Folk (2000–2005), and Madeline Westen on Burn Notice (2007–2013).
A 10-time Emmy Award nominee and seven-time Golden Globe Award nominee, she won a Golden Globe in 1986 and Emmys in 1986 and 1987 for Cagney & Lacey, and a second Golden Globe in 1991 for The Trials of Rosie O'Neill. Gless received a star on the Hollywood Walk of Fame in 1995.
She is also known as Sharon Marguerite Gless.