HSM stars were out in force for the premiere of High School Musical 3: Senior Year, in London's Leicester Square.
They were greeted by loads of screaming fans, who braved the wet weather to catch a glimpse of the actors.
Actress Vanessa Hudgens, who plays maths whiz Gabriella Montez, said "nothing compares" to the London crowd!
Vanessa, Zac Efron, and Ashley Tisdale were joined by dancers and basketball players on the red carpet.
The film follows the gang in their final year of high school before they head off to college.
It's being released on the 24th of October, but getting a ticket to see it could be tricky, because the movie's ALREADY broken UK box office records for advance sales!