She was active in theatre arts in high school, belonging to the Thespian Group, and had the lead in her junior play, not appearing in her senior play because she had enough credits to leave high school in three-and-a-half years. The Sacramento Chamber of Commerce asked her to enter the 1953 Miss Sacramento Contest, which she did because she wanted the chance to perform in front of hundreds of people at Sacramento's Memorial Auditorium, as well as the chance to get free modeling lessons. Out of the 21 girls running, she won the title, singing "Yours" ("Quiéreme Mucho") for the talent portion of the competition. She also became second runner-up for Miss California, winning in the talent division. Joyce began singing at The Wagon Wheel in Lake Tahoe, one time opening for Burl Ives, and performed for various organizations, fundraisers, and social clubs. When she auditioned for a part of a 24-year-old in the play How Deep Are My Roots?, she lied about her age and got away with it because she was tall for 18. She then got the role of Juliet in Shakespeare's Romeo and Juliet at the Little Eaglet Theatre in Sacramento, California. Meadows was a student of Jeff Corey, procured a scholarship to the Pasadena Playhouse, and thereafter studied with Mira Rostova and Stella Adler in New York City.