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Click through the gallery to see the cast of the hit soap opera — including Donna Mills, Alec Baldwin and more! — then and now.
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Donna Mills (Abby Cunningham)
Before the show, Donna, 75, achieved showbiz success on the late 1960s soap opera Love is a Many Splendored Thing and appeared on Broadway in Woody Allen's comedy hit, Don't Drink the Water. Most recently she has appeared as a special guest star on both General Hospital and Nip/Tuck.
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Joan Van Ark (Valene "Val" Ewing)
Though the 73-year-old actress is best known for her role on Knots, she has also starred on the hit soap opera The Young And the Restless. In 2013, the Tony-nominated star reprised her role as Val Ewing on the new TNT series, Dallas. It's a revival of the original 1970s series, which is a Knots Landing spin-off.
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Michele Lee (Karen Fairgate MacKenzie)
Michele, 74, received an Emmy Award nomination for her role as Karen on and has since nabbed two Tony Award noms for her performances in 1974's Seesaw and 2001's The Tale of the Allergist's Wife.
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Ted Shackelford (Gary Ewing)
After starring as Gary Ewing from 1979 until 1993, Ted landed a role on The Young and the Restless in 2006. Last year, the 68-year-old actor reprised his Knots role in three episodes of the new Dallas series.
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Kevin Dobson (Mack MacKenzie)
After playing Mack, Kevin, 73, moved on to another popular soap series, Days of our Lives. Most recently he appeared as Dr. Cameron in a 2014 episode of Anger Management.
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Alec Baldwin (Joshua Rush)
The series helped propel a young Alec, now 58, into stardom during the late 1980s. Since then, he has become one of Hollywood's most successful actors!
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Nicolette Sheridan (Paige Matheson)
After playing Mac's daughter, Nicolette, 52, starred as Edie Britt on the ABC dramedy series Desperate Housewives from 2004 until 2009.
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William Devane (Greg Sumner)
William, 78, appeared in many hit movies including Interstellar, The Dark Knight Rises and 2000's Space Cowboys.