Who's Coming To The Melbourne And Sydney Premiere Of 17 Again?

The Australian 17 Again premieres are happening soon, first in Sydney, on Wednesday the 11th of March, then in Melbourne, on Monday the 16th of March. I know for a fact that Zac Efron will be attending both of these premieres, but I would like to know if anyone else will be coming too. Like Matthew Perry, or Leslie Mann. If anyone knows, please tell me, I would really appreaciate it, thanks!