He will act as ringmaster for the televised two-hour portion of the show, which will be broadcast live on Three from 8.30pm.
"We want to pay respect to the artists and the year they've had, but we also definitely want the fun stuff too: the red carpet, the VIP misbehaviour and no doubt an open bar," Mulligan says.
He will be busy as the show has more than18 live performances and multiple legacy-award winners.
"There's normally one legacy-award winner but after the year we've had, we decided to take the opportunity to celebrate and acknowledge multiple incredible Kiwi artists both past and present who deserve to be inducted to the hall of fame."
He says that thanks to Covid we'll have a unique line-up of current artists performing on a specially designed stage that has to be seen to be believed. Described as a Theatre in the Round stage it was inspired by the legendary Later at the Royal Albert Hall with Jools Holland showcase.
Even though the nominees won't be announced until October 8, there may be some uncomfortable moments if any of Mulligan's favourites don't make the stage.
He currently loves The Beths, Reb Fountain, Teeks, Tom Scott and Nadia Reid and is especially proud of Lorde and Benee.