Justin Timberlake and Jessica Biel Dress Up as Trolls for Halloween With Cute Son Silas: Pics!

'Did I use a holiday for self promo?'

Trollin’ for some treats! Justin Timberlake and Jessica Biel took their family Halloween costumes to the next level on Monday. The couple went trick-or-treating with their son, Silas, while dressed as characters from Timberlake’s new animated film Trolls.

WATCH: EXCLUSIVE: Justin Timberlake Says 1-Year-Old Son Silas Recognizes His Character in 'Trolls'

“When you make your whole family dress up as characters from the movie you’re in but your wife secretly loves it and your son won’t keep his troll wig on,” Timberlake captioned a sweet pic of the trio in their outfits. “Shoutout to @jessicabiel #2BranchsandaPoppy #Trolls #didIuseaholidayforselfpromo Happy Halloween, everybody!!!!”

Timberlake and little Silas were both dressed as his character Branch, while Biel was Poppy (voiced by Anna Kendrick in the movie).

“Happy Halloween from Poppy, Branch and lil Branch. We be Trollin’,” the excited mom captioned a photo with her boys.

MORE: Jessica Biel Pokes Fun at Justin Timberlake's Voting Scandal and His Response Is Perfect

Timberlake recently opened up to ET about his son’s obsession with his new film.

"He knows all the characters already!" Timberlake told ET’s Cameron Mathison. "It's crazy!"

For more from JT’s exclusive interview, watch the clip below!