Newsround has grabbed another High School Musical star for a quick chat - this time it's Justin Martin who plays Donny Dion in number three.
So what does he think about British star Jemma McKenzie-Brown, auditioning for the part and being recognised?
You've only been in the High School Musical 3? What was it like joining an established cast?
I didn't know what to expect. They'd been together for two other movies so I was the newcomer. It was like the first day at school. But from day one they welcomed me with open arms and we became like a big family.
It sounds like the audition for the part was pretty tough - what was that like?
We started with a few hundred just in California - there were thousands across the country. Then we auditioned for three to four days and each day some people didn't make it and got cut. We had learn lines, sing songs and dance too. It was a lot of fun and we made friends in the process too. It was a different type of audition.
In the film your character is best friends with Jimmie. Are you friends with Matt who plays him?
Me and Matt ended up getting paired up in the auditions and had fun. I'm at home in Atlanta at the moment, but I'm heading back to LA next week, so we'll catch up then.
Donny's a bit of a thinker in the films. How like your character are you?
Donny's really organised and the stage manager for the show. I'm not that organised. I'm always getting told to clean my room by my mom, so I wish I had that characteristic. Otherwise we're pretty much the same.
What's your fave song so far?
The Boys are Back from HSM3. Even though I wasn't part of it I watched it being filmed in a real junkyard. The dancing and lyrics and the choreography were amazing. I really liked that one.
And how about your fave dance routine?
A Night to Remember at the prom at the end of HSM3. Doing the ballroom dancing and working in couples. That was really cool.
High School Musical is huge here in the UK. Have you been to the UK, and what do you think of British fans?
I haven't been to the UK, but Jemma McKenzie-Brown's a good friend and she let us know how big a deal it is over there. She was a bit like a novelty on set. We all used to pull British accents when we talked to her. It probably got a bit annoying!
After being in HSM you must be pretty famous. Do you get recognised, and what's that like?
It's weird. Even before the movie came out I got recognised by the fans of the films. I even got calls from people who hadn't spoken to me for five years. It's cool though. The fans response to having new characters was good. It's good that fans have responded well to me.
Are you friends with anyone from the films?
We all bonded really, really well. We became like a a big High School Musical family. There wasn't a specific best friend because we were all constantly hanging out.
What tips would you give to kids wanting to get into acting and dancing?
It has to be something you want to do. Not something other people push you into. It takes a lot of time, hard work and sacrifice. But if it's what you really want then go for it. A whole bunch of people told me I couldn't do it, but if I listened to them I would never have got the part.
Apparently there is a script for High School Musical 4? Do you have a role in that too?
There have been a lot of rumours, but nothing for sure yet. As far as my involvement, I'm not sure. But if they offered it to me I'd jump on it. I had such a great time working on HSM3.