The 30-year-old actress and 26-year-old star spent time with fellow High School Musical co-stars Corbin Bleu and Monique Coleman at a costume party for the holiday.
Tisdale, who played Sharpay Evans in the Disney Channel film series, dressed as the Queen of Hearts from Alice in Wonderland, while Hudgens, who portrayed Gabriella Montez, went as Alice. Bleu and Coleman dressed Lenny Kravitz and Dionne fromClueless, respectively.
High School Musical premiered in 2006, and inspired sequels High School Musical 2,High School Musical 3: Senior Year and spinoff Sharpay’s Fabulous Adventure. Zac Efron also starred, and the first movie soundtrack peaked at No. 1 on the Billboard 200.
Tisdale has since played Savannah Monroe on The CW series Hellcats, and will next appear in Drive, She Said with Jason Biggs. Hudgens had roles in Sucker Punch andMachete Kills, and will portray Rizzo in Fox’s forthcoming Grease: Live.