The pair recently performed 'Sophia' at the Melbourne edition of Laneway Festival
Charli also posted a clip of the pair hanging out backstage
It comes after Chappell Roan demanded that the music industry take better care of artists at the Grammys
It comes after the drummer, songwriter and producer launched his solo career last year
The move was sparked after the ‘Pink Pony Club’ singer called for better support for artists in her Grammys speech
"There is a desire in her to do the complete opposite thing again, which is very in keeping with her ethos"
Both artists wrote that Roan's Grammys speech, in which she called for a liveable wage and health care for developing artists, was "inspiring"
A casting call is looking to fill three supporting roles
They're joined by the likes of Greta Gerwig and Kevin Bacon
The 'Brat' singer warned viewers she would be performing the “least Grammy appropriate” songs at the awards