Jessica Biel's eldest son recognises that he has famous parents

She revealed that Silas knows about his father's stardom as a result of his voice role as Branch in the 'Trolls' film series and can recognise his tunes.

Asked if her children understood what their parents do, Jessica told 'The Tonight Show Starring Jimmy Fallon': "Silas does definitely with Justin because of Branch.

"And also his music - whenever he hears daddy's song he'll go 'Oh yeah, that's dad. No big deal, whatever.'"

Jessica confessed about how Silas loves her to do impersonations from 'Pete the Cat' even though he doesn't even watch the series.

She said: "But the funny thing about 'Pete the Cat' is I tried to get him to watch the show, he will not watch. And yet he says 'Hey mom, hey mom, do one of those voices from the show' and I'm like, 'But you've never seen the show you don't even know.'

"He's just like 'Just do it mom'', so I'll do one of the voices and he'll be like, 'Cool, mum, cool.'"

Justin previously compared the process of looking both Silas and Phineas to adopting NFL tactics.

The 'Mirrors' hitmaker said: "It's a lot of fun but I guess the saying goes, 'Go from a zone defence to a man-to-man very quickly.

"'You go get that one, I'll get this one.' But it's great and Silas is super excited. Right now, he's very much liking it but, you know, Phin can't walk yet or chase him down, so, I don't know, we'll see what happens."