Rhythm & Alps has dropped its official lineup announcement, with "100% Aotearoa" acts.

Six60 are headlining the New Year's festival, alongside Fat Freddy's Drop, Shihad and Benee.

Other acts include The Phoenix Foundation, Quix and Chaos in the CBD.

R&A will also host Wax Mustang, Reb Fountain, Racing Truth, Trei Fairbrother Ferby and K2K There's A Tuesday.

2020 marks Rhythm & Alps' 10-year anniversary as the premier summer festival of the South Island.

"We've carefully hand-picked these acts from around Aotearoa to highlight the diverse talent that New Zealand has to offer," said Rhythm & Alps festival director Alex Turnbull.

"This is a one-off quintessential Kiwi all-star festival, with a second announcement still to come!"

Fat Freddy's Drop band member Scott Towers told Heather du Plessis-Allan there will be a lot of up-and-coming Kiwi bands performing too.

"There's no better breeding ground than on a big stage in front of 5-15,000 people who just want to party, and that will bring out the best of them I think."

Rhythm & Alps takes place in Wanaka's Cardrona Valley, December 29-31. For the rest of the lineup, tickets and info, see Rhythmandalps.co.nz.