[3] Nigro has produced, written, and co-written songs for Sky Ferreira, Joe Jonas, Kylie Minogue, Caroline Polachek, Olivia Rodrigo, Chappell Roan, Dermot Kennedy, Maisie Peters, and Conan Gray.

Nigro has been nominated for 16 Grammy Awards, from which he won Best Pop Vocal Album for his work on Rodrigo's Sour (2021)[4] as well as Producer of the Year, Non-Classical in 2025.

[5] Daniel Leonard Nigro[6] was raised in Massapequa Park, New York, on Long Island,[7] to Louis, a second-generation business owner[8] and Claire, an artist specializing in oil painting.

[17] With high school friends Saen Fitzgerald and Cliff Sarcona, Nigro formed the indie rock band As Tall as Lions in 2001, self-producing a four-song demo that included "King of the World", which became a local fan favorite.

To continue writing, producing and releasing songs together, Nigro formed independent label Amusement Records.

It’s about, ‘Do we feel a connection that we can spend so much time making something and then promote it and find the right creative teams and annoy you about content?’ It’s everything.”[28] This is a common theme in Nigro's artistic career, helped along with the full support of his parents.