some initial interest in musical theater, but is careful not to upstage Sharpay. Due to her dedicated presence during rehearsals for the spring musical, Ms. Darbus casts Tiara as an understudy. Tiara later overhears Gabriella Montez talking to Taylor McKessie about an early orientation at Stanford University, which would make Gabriella unable to perform as the lead in the musical. Tiara informs Sharpay, who is impressed by her dedication. Gabriella leaves for the orientation, allowing Sharpay to take over her part. Tiara, in turn, takes over Sharpay's former role. During opening night, Sharpay is embarrassed after having to perform with Jimmie Zara, Troy Bolton's understudy. When she goes back to her dressing room, she finds Tiara in her costume. Tiara tells Sharpay that she is the new queen of the drama department and that it is time for Sharpay to move aside. Sharpay, in retaliation, upstages Tiara onstage. Later, Tiara learns that Sharpay will be returning occasionally to East High after graduation to help Ms. Darbus with the drama department and, undoubtedly, continue to upstage Tiara. Tiara is portrayed by Jemma McKenzie-Brown in High School Musical 3: Senior Year. Disney star Selena Gomez has admitted to turning down the role, while Ali Lohan reportedly auditioned for the role. Although Brown was originally set to star in High School Musical 4: East Meets West, it has since been confirmed that she will not reprise her role. Jimmie Zara Jimmie Zara, also known as "the Rocket" or "Rocketman", is a member on the East High School boys' varsity basketball team. In the final game of High School Musical 3: Senior Year, he is used as somewhat of a secret weapon and scores the winning basket. He looks up to Troy Bolton and has a small crush on Sharpay Evans. He is Troy's understudy for the spring musical and is able to perform with Sharpay on opening night. Matt Prokop portrays Jimmie in the third film of the series. Disney star Tony Oller auditioned for this role. Prokop has stated that he signed on for three potential films, including High School Musical 3. However, Prokop has since confirmed that he will not be in the fourth film, as Disney wanted to go in a new direction. Donny Dion Donny Dion is a member of the East High School boys' varsity basketball team. It is unclear whether or not he is a player or