In order to get cast in this film, Justin McElroy, Travis McElroy, and Griffin McElroy created a podcast called "The McElroys Will Be In Trolls 2" and eventually were successful.
Chaz The Smooth Jazz troll is modeled after Kenny G.
Delta Dawn's looks were conceived having Dolly Parton as the main reference.
South Korean girlgroup Red Velvet voicing the K-pop Trolls along with their song Russian Roulette as part of the soundtrack and sang a part in Just Sing. One of the member (Wendy) also voicing Princess Poppy in the Korean dub