Justin Timberlake celebrates 40th birthday promising 'it's only up from here'

Justin Timberlake.

He was the Mouseketeer who became a pop sensation and award-winning actor, marrying one of Hollywood’s leading ­ladies along the way. But as Justin Timberlake turns 40 on Sunday, he reckons things can only go “uphill from here”. The star is planning a quiet celebration with his wife Jessica Biel, 38, and two children at their sprawling Montana home.

“I’m excited,” he says. “I’m going to keep low expectations, but I’m pretty sure it’s going to be better than my 39th year. It’s only uphill, baby.”