Netflix has renewed Trollhunters for a 13-episode Season 2, to release later this year, EW reveals:
EW can exclusively reveal that, following the successful run of the first 26 episodes, a second season of 13 episodes will arrive later this year, with production already long underway for season 2.
Breaking the Season 2 renewal to the publication, creator Guillermo del Toro said that production is long underway:
Well, we got very good news about how many people were watching the series, but we got confirmation that the next  episodes are a go. We’ve been working on a second season for a while now because we knew that if everything went right, we could proceed. We’re going to go ahead and now continue, rather than start, because we’ve been doing it for more than a year. The reality and the beauty of this is that we can continue not only the storyline and the characters, but we have a huge swath of work from Anton that allows us to continue Anton through more than half the season.
Will there be Trollhunters Season 3 in 2018? Stay tuned…