Watch: the 'Stranger Things' cast attend/be a part of a Mac DeMarco concert.

Mac DeMarco is currently on tour around America in support of his latest album 'This Old Dog', and last night played a show in Atlanta, Georgia - where the new season of 'Stranger Things' has been filming. A selection of cast-members - Finn Wolfhard, Joe Keery, and Charlie Heaton - were all in attendance, with Wolfhard even playing on stage with DeMarco, as well as Keery and Heaton stage-diving into the audience at one point.

Firstly, watch Finn jamming with Mac:

+ here is Joe stage-diving in all its glory:

A post shared by Joe Keery (@uncle_jezzy) on May 21, 2017 at 8:01am PDT

P.S. Click here to read our latest interview with Finn Wolfhard.