Judith Light is an American actress, producer, and activist.

Light made her professional stage debut in 1970, before making her Broadway debut in the 1975 revival of A Doll's House. Her breakthrough role was in the ABC daytime soap opera One Life to Live from 1977 to 1983, where she played the role of Karen Wolek. For this role, she won two consecutive Daytime Emmy Awards for Outstanding Lead Actress in a Drama Series. She later starred as Angela Bower in the long-running ABC sitcom Who's the Boss? from 1984 to 1992, and was featured in many other television sitcoms, dramas and films. She played the recurring role of Elizabeth Donnelly in the NBC legal crime drama Law & Order: Special Victims Unit (2002–2010) and also played Claire Meade in the ABC comedy-drama Ugly Betty (2006–2010), for which she was nominated for a Primetime Emmy Award in 2007.

She received her first nomination for a Tony Award in 2011, for her performance in the original Broadway play Lombardi. In 2012 and 2013, Light won two consecutive Tony Awards for Best Featured Actress in a Play, for her performances in Other Desert Cities and The Assembled Parties. From 2013 to 2014, Light played the role of villainous Judith Brown Ryland in the TNT drama series, Dallas. In 2014, she began starring as Shelly Pfefferman in the critically acclaimed Amazon Studios dark comedy-drama series Transparent, for which she received Golden Globe, Primetime Emmy, and Critics' Choice Television Award nominations.

Light is a prominent LGBT and HIV/AIDS activist. Her advocacy work began in the early 1980s, in the early days of the HIV/AIDS epidemic.

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