Singer Justin Timberlake says he and his wife Jessica Biel "don't know" if they always like their 22-month-old son Silas.

Timberlake says 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, reports

"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," Timberlake said.

Biel said: "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."

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