Dorothy Ruth Hoogstraten, known professionally as Dorothy Stratten, was a Canadian model and actress, primarily known for her appearances as a Playboy Playmate. Stratten was the Playboy Playmate of the Month for August 1979 and Playmate of the Year in 1980, and appeared in three comedy films and in at several episodes of TV shows broadcast on American networks. Dorothy was murdered shortly after co-starring in the movie They All Laughed, at the age of 20, by her estranged husband and manager Paul Snider, whom she was in the process of divorcing and breaking business ties. Snider committed suicide after he killed Stratten.

A Playmate is a female model featured in the centerfold/gatefold of Playboy magazine as Playmate of the Month (PMOTM). The PMOTM's pictorial includes nude photographs and a centerfold poster, along with a pictorial biography and the "Playmate Data Sheet", which lists her birthdate, measurements, turn-ons, and turn-offs. At the end of the year, one of the 12 Playmates of the Month is named Playmate of the Year (PMOTY). Every Playmate of the Month is awarded a prize of US$25,000 and each Playmate of the Year receives an additional prize of US$100,000 plus a car and other discretionary gifts. In addition, Anniversary Playmates are usually chosen to celebrate a milestone year of the magazine. The use of the word "Playmate" in a sexual sense did not originate with Playboy, and was seen at least as early as 1950 in Vue magazine.