Jack Osbourne and his fiancée Lisa Stelly are to wed this weekend, according to reports.

The reality TV star and his actress fiancée, who have recently become first time parents to daughter Pearl, only sent the invites for their wedding this week to close friends and family in order to keep the nuptials a sercret.

A source told Page Six: “They just sent the invites out and are asking guests to sign non-disclosure agreements.''

Jack, who was diagnosed with multiple sclerosis (MS) soon after Pearl's birth has admitted the news was initially tough to take, but he now knows his condition is ''manageable'' and says his family is higher on his list of priorities than his medical problems.

He said: ''I'm alright. I think when you get news like, 'You have MS,' it's a bit of a buzz kill, but when you do a bit of research into it, you realise it's quite manageable as long as you take care of yourself.

''Having a new baby is forcing me to just focus on that and work, so it takes the sting away a little bit.''