Donna Mills is an American actress and producer. She is best known for her long-running role as villainous Abby Cunningham on the prime-time soap opera Knots Landing, and for her role as Tobie Williams, the girlfriend of Clint Eastwood's character in the 1971 cult film Play Misty for Me.
Mills began her television career in 1966 with a recurring role on The Secret Storm. She made her film debut the following year in The Incident and appeared on Broadway in the Woody Allen comedy Don't Drink the Water. She then starred for three years in the soap opera Love is a Many Splendored Thing.
She landed the role of Abby in Knots Landing in 1980 and was a regular on the show until 1989. For this role she won the Soap Opera Digest Award for Outstanding Villainess three times, in 1986, 1988 and 1989. She has since starred in several TV movies, including False Arrest, In My Daughter's Name, Dangerous Intentions, The Stepford Husbands and Ladies of the House. In 2014, she joined the cast of long-running daytime soap opera General Hospital.