|“||That's called acting. You should try it sometime.||„|
|~ Tiara betrays Sharpay.|
Tiara Gold is the secondary, later true main antagonist in the 2008 live action Disney film, High School Musical 3: Senior Year.
She was portrayed by Jemma McKenzie-Brown.
Tiana comes to East High School as a foreign exchange student from London and meet Sharpay Evans who hires her as her assistant. She shows interest in musical theater but tries not to upstage Sharpay until later. Later she is made Sharpay's understudy and she and Jimmy fight. She overhears Gabriella telling Taylor that she's going to college early and tells Sharpay about it. After being humiliated in the stage Sharpay goes to her room to make up for her embarrassment with her own number only to see Tiara wearing her costume. Tiara tells her that she is from the London School of Dramatic Arts and that next year the drama department will be hers and that she was acting all along. When Tiara performs the reprise of A Night To Remember, Sharpay crashes her performance. Mrs. Darbus later announces that Sharpay will be helping in the drama department next year which causes Tiara to smirk angrily.
- Though Sharpay is pretty much the main antagonist of the trilogy, Tiara turns out to be the true villain in this one because she had bigger plans than Sharpay.