Rosanne Katon is an American model, actress, comedian and activist. She was Playboy magazine's Playmate of the Month for its September 1978 issue. Her centerfold was photographed by Mario Casilli. Katon was born in New York City to a Jamaican-born father and an African-American mother. Beginning in the mid-1970s, Katon worked steadily in Hollywood, including a stint on Grady, the short-lived spin-off of the hit situation comedy Sanford and Son that starred Whitman Mayo in the title role, and guest appearances on Jason of Star Command, What's…