While Seymour will likely be the least experienced when it comes to physical activity in the event, he has sent a warning about his untapped basketball skills.
"You know people have underestimated me before, such as when people underestimated my dance… actually they were absolutely right to underestimate my dancing, but not my basketball," Seymour said in a promotional video.
"I can't wait."
The dancing he refers to occurred during the seventh season of New Zealand's Dancing with the Stars in 2018, where Seymour featured as one of 12 celebrities and became famous for twerking during a routine.
For the record, he and partner Amelia ended up finishing a respectable fifth.
Other names confirmed for the chairty event include double Olympic gold medallist Eric Murray, racing legend Greg Murphy, Black Fern Ruby Tui and former All Black Carlos Spencer.
The game will take place at Spark Arena with the hopes of delivering a light-hearted, entertaining event to carry out what has been a tumultuous year for many.