Will was born in Bronx, New York, and raised in Hunterdon county in New Jersey. His town of Bloomsbury was home to just over 800 people.
Will self taught himself the drums and has played since he was 11.
Holbrook spent his age 16 and 17 summers in LA working as a Production Assistant on feature films.
Will is the son of orgonomic psychiatrist David Holbrook, and doctor Jennifer Petrillo. He has one sibling, little sister, Abigail Holbrook, whom he is very close with.
Counts one of his proudest moments as playing Romeo in Romeo and Juliet with the Archway Theatre company in 2017.
Released Way of the Wind (2019) as the first film under his production company (Deep End Productions). Shot entirely on iPhone during Holbrook's 22 day long solo road trip from Los Angeles to the Arctic Circle in Alaska and back, then edited down from 33 hours of footage.