You better aca-believe it! The makers of Pitch Perfect 3 have treated us to a behind-the-scenes teaser trailer – and it's studded with stars. 

Front and centre you have Anna Kendrick and Rebel Wilson on hilarious form. But can you spot The Crown's John Lithgow? Or music industry star DJ Khaled? Or Orange is the New Black actress Ruby Rose?

Elizabeth Banks may have handed over the director's chair to Trish Sie – who guides us through all the backstage action – but she's still having fun as Gail. 

John Lithgow tries out a few Snapchat filters, while Rebel Wilson gets attacked by dogs (even more problematic than you'd think, as she's allergic). Plus, Anna Kendrick struggles with watery night shoots. 

The only thing missing? Jesse Swanson (Skylar Astin) and the rest of the Trebles, who won't be making an appearance in Pitch Perfect 3.

Still, it looks like the cast genuinely had a ton of fun. Aca-mazing.

Pitch Perfect 3 will be released in UK cinemas on 22nd December 2017