Stevenson's publicity machine continued to promote her. She was reported enjoying riding horses as an activity and playing table tennis. In November 1957, she won $300 in prizes at a horse show and participated at the National Horse Show at the Cow Palace in San Francisco.
On 12 November 1957, Stevenson appeared as Kathy Larsen in the episode "Trail's End" of the ABC/Warner Brothers western series, Sugarfoot.
A one-time Miss Los Angeles Press Club, Stevenson was placed on contract by RKO Pictures in November 1956.
After an education in exclusive Californian private schools, her theatrical debut was with her mother in Liliom, a play produced by the Sombrero Theater, in Phoenix, Arizona, in April 1955 and also with the husband and wife team of Fernando Lamas and Arlene Dahl.
When her parents divorced in 1944, she stayed with her father and new stepmother, Frances.
Born in 1938 in London, England as Joanna Venetia Invicta Stevenson, she is the daughter of film director Robert Stevenson and actress Anna Lee.
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