Justin Timberlake ''always wanted'' to put his music into a film.

The 35-year-old singer handled the soundtrack for the animated movie 'Trolls' - as well as acting in the feature - and has now said that combining his passions for both acting and singing was something he had always been interested in doing.

Speaking to Deadline.com about the movie - which has been nominated for a Golden Globe award for Best Original Song for 'Can't Stop The Feeling' - Justin said: ''I can honestly say I've always wanted to combine the two, do music for a film. I never thought it would be 'Trolls' that would be my first foray into that, but I have always wanted to do it.

''It was so fun, every day. Playing a character in the movie as well.''

Director Mike Mitchell said that the idea for the feature - which is based on the popular children's toys known for their wild hair - came from the lack of ''mythology'' surrounding the origins of the troll dolls.

He said: ''It all came together with that little creature, the troll with the hair.

''The cool thing was there was no story, there was no world. That's like a great opportunity for us and for all the artists that worked on it that we got to create this entire world and mythology that didn't exist.''

Meanwhile, Justin previously stated that the movie - which was released last month - has already become a hit with his 20-month-old son Silas, whom he shares with wife Jessica Biel.

He said: ''He knows all the characters already! It's crazy!

''I got to screen it before anybody. I had to screen it before everybody because I had to make sure all the music was working out.''