Siân Darling is Kelly's de facto partner. They met in 2014 performing in a theatre show called 'Funeral'. The couple continue to live and work together from their St Kilda base. Darling is an artist, activist, curator and producer, and has been working on Kelly's professional management team since 2018. Her influence on Kelly's work is noted in the Stuart Coupe biography, particularly her passion for the natural world. Darling is supposedly the subject of several songs and has produced and directed some of Kelly's music videos; 'With the One I Love', 'Sleep Australia Sleep', 'When We're Both Old and Mad'. Darling produced the album Cannot Buy My Soul (2020 edition) picking up the torch that Kelly first lit in 2007.