Héctor Elizondo was cast as Joe, Mia's limousine driver and Clarisse's head of security. Elizondo is known for appearing in all 18 films Marshall directed. Singer Mandy Moore was cast as Mia's school rival Lana Thomas, her first credited film role. Marshall was the first film director with whom Moore, sixteen years old at the time, ever worked; she recalled that the director "had no business casting me ... I didn't know what I was doing. So I think the highlight of the film was working with him." Moore also appreciated the fact that several most of her co-stars were similar to her in age, crediting the overall experience with setting her acting career "in motion". Robert Schwartzman was cast as Michael, Mia's love interest and Lilly's brother. His real-life band Rooney has a cameo appearance as garage band Flypaper, with Schwartzman playing their lead singer. The musicians perform "Blueside", one of Rooney's original songs. Schwartzman wanted to change his last name in the credits to Cage in honor of his cousin Nicolas Cage, but the film's promotional material had already been finalized. "The Princess Diaries" remains Schwartzman's only major film role.