Oliver James McGill is an Australian musician who is the keyboard player and backing vocalist for The Cat Empire. He composed "Dumb Ways to Die" for Metro Trains Melbourne. McGill is also a member of several other bands, including The Genie, The Conglomerate, Peaking Duck, Outlier, The Future, 77, and Past Ollie's Bedtime.

The Cat Empire are an Australian jazz/funk band, formed in Melbourne, Victoria, in 1999. For most of the band's duration, the core members were Felix Riebl, Harry James Angus, Will Hull-Brown (drums), Jamshid "Jumps" Khadiwhala, Ollie McGill and Ryan Monro. Monro retired from the band in March 2021, while Angus, Hull-Brown and Khadiwhala all left in April 2022. They are often supplemented by The Empire Horns, a brass duo composed of Ross Irwin (trumpet) and Kieran Conrau (trombone), among others. Their sound is a fusion of jazz, funk, ska, and rock with heavy Latin influences.