Justin Timberlake and Jessica Biel "don't know" if they always like their young son.

Justin Timberlake and Jessica Biel

Justin Timberlake and Jessica Biel

The couple think 22-month-old Silas is "amazing" but are finding things quite "hard" at the moment because he is going through a difficult stage, but they are hoping it is a phase that doesn't last.

Speaking on the red carpet at the Oscars, Justin said: "He does not want the diapers changed. He's hitting his terrible twos a little early, so we're hoping he'll get out of them a little early."

Jessica admitted: "He's doing amazing, but it's one of those things where you're like, I love you, but I don't know if I like you."

And her spouse added: "There's other moments where you're like, This is really hard and I don't know what the hell I'm doing."

The 36-year-old singer - who opened the Academy Awards with a performance of 'Can't Stop the Feeling' from 'Trolls - was up for his first-ever Oscar this year, and even before the ceremony began, he already felt like he'd won because his 34-year-old spouse looked so stunning in her Kaufmanfranco gown.

Asked if he'd helped Jessica choose her dress, Justin - who lost out to 'City of Stars' from 'La La Land' told 'Entertainment Tonight': "I just admired. We were on our way here and I was like, 'I win. Everybody go home.' I have my own gold statuette already."

Ahead of the ceremony, the 'SexyBack' hitmaker was backing his former fellow Mickey Mouse Club star Ryan Gosling to scoop Best Actor in a Leading Role for 'La La Land', and though he lost out to 'Manchester by the Sea' star Casey Affleck, Justin is confident it's only a matter of time before his pal picks up one of the coveted statuettes.

He said: "Listen, let me say something about Ryan.

"He is so talented, so gifted. If he does not win tonight, it's in the cards for him. He's just one of those guys."