ABC have released more photos from the Once Upon a Time: Season 4 premiere. Previous images concentrated only on the new additions of Frozen characters Anna (Elizabeth Lail), Elsa (Georgina Haig) and Kristoff (Scott Michael Foster), but the new collection have both more of those folks, plus returning Once characters like Emma, Hook and Regina. Plus, you'll see the return of Giancarlo Esposito (Breaking Bad, Revolution) as Sidney Glass, AKA the Magic Mirror.

We've included both the previously released pics and the new ones in the gallery below, rounding up all the Once: Season 4 photos so far.

Once Upon a Time: Season 4 Photos: Once Upon a Time: Season 4 Photos 28 IMAGES

Once Upon a Time: Season 4 premieres Sunday, September 28th on ABC.