Apart from these television roles, Romero's most notable work in film in this period is as A.J. Arno, a small time criminal who continually opposes Dexter Riley (played by Kurt Russell) and his schoolmates of Medfield College in a series of films by Walt Disney Productions in the 1970s.
In The Simpsons episode "Hungry, Hungry Homer", the ghost of Cesar Chavez appears as Cesar Romero because Homer Simpson doesn't know what Cesar Chavez looks like.
In 2008, comedian Shaun Micallef started doing impersonations of Cesar on his television show Newstopia. The impersonations featured Cesar doing fake news reports from various locations.
Romero always claimed his grandfather on his mother's side was Cuban poet and patriot José Martí. There was some speculation that Maria was fathered by Martí who was a boarder in the Mantilla household, but he never claimed Maria as his daughter in his lifetime.
Romero wore a man's tennis bracelet inscribed with his favorite nickname: "Butch." The term was reportedly bestowed on Romero by his one-time dancing partner Joan Crawford, who teased Romero by telling him: "You're so butch!" While Romero's homosexuality was an "open secret" in Hollywood, the movie-going public was unaware of his sexual orientation and there was never any embarrassing scandal surrounding his male liaisons, partially because he strove to be as discreet as possible.
Romero was a mainstay of the Hollywood social circuit until his peaceful death in 1994. He was cremated and his ashes interred at Inglewood Park Cemetery in South Los Angeles community of Inglewood, California.