Sepuloni first became an MP in 2008, lasting a term before dipping out of politics and returning again in 2014 as the MP for Kelston - a seat she still holds.
She became deputy prime minister in January 2023 when Chris Hipkins took over from Dame Jacinda Ardern.
New Zealand’s first MP of Tongan descent, Sepuloni was a senior minister between 2017 and 2023, holding portfolios including social development and ACC.
The MP has not been seen in Wellington for some time after an Achilles injury which required surgery, forcing her to take leave from Parliament for a number of weeks.
She is due back on Tuesday, and will be getting around the halls of power on a scooter.
Sepuloni will be the first MP to compete on Celebrity Treasure Island, but she will not be the only politician to have taken part in a reality TV show.
In 2018, Act leader David Seymour hit the country’s screens on Dancing with the Stars and made it all the way to the semi-final, finishing fifth overall.
The following year, he made a one-episode return as a former contestant.
Seymour is most remembered for his dance routine, which involved him wearing bright highlighter-coloured 80s gym gear, and in which he twerked on stage.
Dancing, it seems, is in the Act party’s blood, with former leader Rodney Hide also being a contestant in 2006.
Hide received a record low score in one episode, receiving just one point each from the four judges after he dropped his dance partner, Krystal Stuart, mid-routine, and the pair were eliminated.
TVNZ has been contacted for comment.