Holly Isabella Rankin (born 19 December 1991), who performs as Jack River, is an Australian singer-songwriter, multi-instrumentalist, and producer. Her debut album, Sugar Mountain (22 June 2018), peaked at No. 11 on the ARIA Albums Chart. At the ARIA Music Awards of 2018 she received nominations for Breakthrough Artist, Best Pop Release and Engineer of the Year (the latter shared with Xavier Dunn and John Castle).