In 2016–17, Tolman went on tour with Mondo Cozmo as part of the backing band along with Drew Beck, Chris Null, and James Gordon.
He and Brittany play on multiple songs from their debut album, Night Visions (2012) (including multi-platinum single "It's Time"; US #15, UK #23),[3][4] despite leaving the group before its release.
In 2018, Andrew and Brittany re-joined Imagine Dragons during a show in Las Vegas for one song.
Tolman is a studio drummer for Mount Saint, an indie pop group fronted by his wife, also a former member of Imagine Dragons.
[8] In 2016, Andrew and wife Brittany released two singles, "Chaperone" and "Freeway", for their alt pop duo called Tolman.