British reality TV personality Jack Osbourne is to wed his longtime girlfriend Lisa Stelly in Hawaii this weekend, the New York Post reported Friday. \"They just sent the invites out and are asking guests to sign non-disclosure agreements,\" an insider told the newspaper, explaining the family is planning a low-key affair. No other details about the wedding were immediately available. The couple have a 5-month-old daughter together. Jack Osbourne is the son of rock icon Ozzy Osbourne and \"The Talk\" co-host Sharon Osbourne.