Jack Osbourne, Lisa Stelly to marry this weekend?

Los Angeles: TV actor Jack Osbourne will reportedly marry his fiancee Lisa Stelly this weekend.

The 26-year-old is planning to have a private ceremony where only close friends and family will be invited.

"They just sent the invites out and are asking guests to sign non-disclosure agreements," a website has quoted a source as saying.

The couple have a six-month-old daughter Pearl.

Osbourne, 26, has been diagnosed with multiple sclerosis.