Justin Timberlake's son can already recognise 'Daddy's songs'

Raising him right!

Justin Timberlake's son Silas (with wife Jessica Biel) is already bopping along to his superstar dad's music.

"He knows that ['Can't Stop the Feeling'] is my song," Justin told TheFIX's Ashley Spencer. "We just say, 'That's Daddy's song,' that I wrote the song."

But the 19-month-old hasn't quite wrapped his brain around the fact that one of the lead characters in Trolls (in Australian cinemas December 1) is actually voiced by his famous father.

"I think that Branch is [just] Branch for him right now," says the 35-year-old singer and Trolls executive music producer.

In the film, curmudgeonly Branch sets off with eternally optimistic Poppy (voiced by Anna Kendrick) on a quest to save the trolls from being eaten by the Bergens.

"I'd say I'm more like Branch before I have breakfast. I just wake up hangry," Justin admitted. "I don't know that anyone is as optimistic as Poppy. That would probably be weird."

While Bergens believe eating a troll will bring them instant happiness, there's only one food on Justin's mind: "Pizza. I never met a pizza that I didn't like."

Watch the video above to find out about Justin's chemistry with Anna Kendrick and what he really thinks of his NSYNC days.