Donna Mills (born Donna Jean Miller on December 11 1940 in Chicago, Illinois) is an American actress, perhaps best known for her role as Abby Fairgate Cunningham Ewing Sumner on the primetime soap opera Knots Landing.
In 1971, Mills co-starred with Clint Eastwood in the thriller Play Misty For Me, which has remained her most prominent movie role to date. Mills then spent much of the 1970s appearing as a guest star on a variety of television shows such as The Six Million Dollar Man, The Love Boat, CHiPs, Quincy, M.E., Thriller, Police Woman, and Fantasy Island, as well as several made-for TV movies.
In 1980, she landed her most prominent role - that of scheming homewrecker Abby Fairgate Cunningham Ewing Sumner on the long-running primetime soap opera Knots Landing, a role she played from 1980 to 1989. After leaving the series, Mills concentrated on made-for-TV movies, several of which she co-produced herself. She returned to Knots Landing for its final episode in 1993, and again for the reunion mini-series Knots Landing: Back To The Cul-De-Sac in 1997. In between these appearances, she also had a recurring guest role as Josie Bissett's mother on the popular 1990s soap opera Melrose Place.
In more recent years, Mills has continued to make made-for-TV movies as well as making guest appearances in series such as Cold Case and Nip/Tuck (in which she guest-starred with fellow Knots Landing star Joan Van Ark). In 2005 she reunited with the rest of the Knots Landing cast for the reunion, Knots Landing: Together Again, in which the series' co-stars reminisced about the series.
Mills appeared on Broadway in Woody Allen's comedy, Don't Drink the Water, as the Sultan of Bashir's wife.