Regan Tamanui is a self-taught artist based in Melbourne, Australia. In October 2000, he founded the Melbourne Stuckists, the fourth Stuckist group to be started and the first outside of the United Kingdom.

In October 2000, Regan Tamanui, a jazz, ska and skank fan, discovered the London Stuckist group whilst surfing the internet. He sent an email and then founded the Melbourne Stuckists. He saw "The main (point) that really stood out was the ability to wake up and paint pictures." This was the fourth Stuckist group to be started and the first one outside the UK, thus launching an international movement that by 2006 counted 127 groups in 32 countries. On 27 October 2000 he staged the first Stuckist show outside the UK, when he mounted the Real Turner Prize Show at the Dead End Gallery in his home in Reno Road, Sandringham, concurrent with three shows of the same title (two in England and one in Germany) in protest against the Tate Gallery's Turner Prize.

Besides Tamanui, the other initial members of the Melbourne group were Justin Grub, Ben Blanchette, Malcome Mmackie and Dave Freeman Rose. A subsequent line-up was Basil Kouvelis, Justin Grubb, Ben Frost, Nigel Stein, Daniel Gorzadek, Stephen Sperling and Dennis Roper. Tamanui expressed his and the group's artistic philosophy: „There are some people who shit in a tin. Is that really art?”

In 2002, Tamanui, along with other Australian Stuckists was shown at The First Stuckist International, the inaugural show of the Stuckism International Gallery, Shoreditch, London. The show also included Godfrey Blow who had followed Tamanui's lead and founded a Perth Stuckists group. In the same year, Tamanui opened the Stuckism International Centre Australia, with an ongoing exhibition of work, as well as the first international Stuckist show in Australia, Stuck Down South, at the FAD Gallery. This included founding Stuckists, Thomson, Ella Guru and Sexton Ming. (Like the London gallery it has now ceased operating.)

Tamanui takes his lead from Picasso and American pop artist Shag. His work is "large, vibrantly colored, pop-art style paintings", often showing several figures interacting. Since 2001 he has exhibited his work in both a solo and group capacity in Hobart, Melbourne, Adelaide, Sydney and London.