Joel Little (born 13 February 1983) is a New Zealand record producer, musician and Grammy Award-winning songwriter. He is best known for his work as a writer and producer with artists Lorde, Taylor Swift, Broods, Sam Smith, Imagine Dragons, Ellie Goulding, Khalid, Elliphant, Jarryd James, Shawn Mendes, Marina Diamandis, Amy Shark, Goodnight Nurse, Olivia Rodrigo, Years & Years, the Jonas Brothers, and Niall Horan.

Source: Wikipedia (https://en.wikipedia.org/wiki/Joel_Little)