Trollhunters: Happy Birthday to You! (2017) is a Animation, Family, Fantasy film that follows what's better than a birthday? How about a chorus of trolls and humans wishing you the happiest, most epic celebration in history! Trollhunters: Happy Birthday to You! is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 8.0 out of 10 from 4 votes. Fans of animation movies may also want to explore similar titles below.