In January, Lorde told reporters at the Golden Globe Awards she didn't have a timeline for her next album.
"For me I have to kind of write a project lyrically before I attack it musically. So I've written a lot of amazing stuff and I'm just tentatively starting to make it music."
The 18-year-old and Little recorded her first album at the producer's Golden Age studio in Auckland three years ago. From Pure Heroine came the global hit Royals and the duo were nominated for a host of awards, including Song of the Year at the Grammys, which they won for Royals.
They also worked together on The Hunger Games hit single, Yellow Flicker Beat, and were nominated for a Golden Globe for Best Original Song.
Little's return is fresh off the back of his collaboration with former Silverchair frontman Daniel Johns, who launched a solo career in January with the song Aerial Love.
Little is also known for his work with Nelson-based brother and sister act Broods.