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Sheridan made her debut in 1984's Paper Dolls, but her breakthrough came in 1986, when she joined the cast of the CBS night-time soap Knots Landing as "Paige Matheson". She started out as a recurring role, but proved to be so popular that she was a regular during the 1988-89 season. For her performance in the role, she won the 1990 Soap Opera Digest Award for "Outstanding Lead Actress: Prime Time" and the 1991 Soap Opera Digest Award for "Outstanding Heroine: Prime Time". The same year, she was named one of People Magazine's "50 Most Beautiful People." After the series ended in 1993, she appeared in several made-for-TV movies and the films Spy Hard and Beverly Hills Ninja and auditioned for the role of Grace Adler on Will & Grace (on which she would later guest-star).

In 2004, Sheridan's role as sexy divorcee Edie Britt in ABC's Desperate Housewives brought her renewed media attention.

(wikipedia.org)