Katherine Marie Helmond was an American actress. Over an acting career spanning six decades, she was best known for her starring role as Jessica Tate on the sitcom Soap (1977–1981) and her co-starring role as Mona Robinson on Who's the Boss? (1984–1992). Helmond also played Doris Sherman on Coach (1995–1997) and Lois Whelan on Everybody Loves Raymond (1996–2004). She also appeared as a guest on several talk and variety shows.

Soap is an American sitcom television series that originally ran on ABC from September 13, 1977, until April 20, 1981. The show was created as a nighttime parody of daytime soap operas, presented as a weekly half-hour prime time comedy. Similar to a soap opera, the show's story was presented in a serial format, and featured melodramatic plotlines including alien abduction, demonic possession, extramarital affairs, murder, kidnapping, unknown diseases, amnesia, cults, organized crime warfare, a communist revolution, and teacher-student relationships. In 2007, it was listed as one of Time magazine's "100 Best TV Shows of All-TIME", and in 2010, the Tates and the Campbells ranked at number 17 in TV Guide's list of "TV's Top Families".