Brother of Lucie Arnaz Son of Desi Arnaz and Lucille Ball. He appeared on the first cover of TV Guide (April 1953) with mother Lucille Ball. Was believed to be the biological father of Patty Duke's oldest son Sean Astin until the two men developed a friendship and agreed to blood testing in the 1990s At age 12, he was the drummer for the hit rock act Dino, Desi, & Billy. Dino was Dean Paul Martin, Dean Martin's son. Billy was Billy Hinsche. They had a top 40 hit in 1965 with "I'm A Fool". Portrayed his own father, Desi Arnaz in The Mambo Kings (1992). He and his wife, Amy Arnaz, have an adopted daughter, Haley Arnaz, who is also a performer. Brother-in-law of Laurence Luckinbill. Nephew of Fred Ball and Kenny Morgan. Is portrayed by Matthew Perry in Call Me Anna (1990) (TV) Born in the same hospital as Micky Dolenz, Natalie Cole, and former girlfriend Liza Minnelli.