Listen to When I Grow Up online. When I Grow Up is an English language song and is sung by Rei Yamauchi Fulker, Andrei Shen, Winter Jarrett Glasspool, Ashton Robertson, Lashana Lynch, Alisha Weir and The Cast of Roald Dahl's Matilda The Musical. When I Grow Up, from the album Roald Dahl's Matilda The Musical (Soundtrack from the Netflix Film), was released in the year 2022. The duration of the song is 3:42. Download English songs online from JioSaavn.