Jack Osbourne to marry Lisa Stelly in Hawaii

Now that Jack Osbourne and girlfriend Lisa Stelly are parents (to an adorable 5-month-old baby girl named Pearl), they're ready to take another step in their relationship: The engaged couple are getting married in Hawaii this weekend.

Osbourne and Stelly are ready to get hitched, Page Six reports. A source tells the newspaper that the couple is trying to keep the wedding very low-key. "They just sent the invites out and are asking guests to sign non-disclosure agreements," the source says.

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Stelly's grandmother tells Celebuzz that the ceremony will take place on Saturday, Oct. 5. "We really do wish them the very best for a happy life together, Stelly's uncle, Larry Chamberlain, says.

Hawaii is the same place where Osbourne's parents got married 30 years ago. According to Celebuzz, Stelly and Osbourne have been in Hawaii all week long prepping for their big day.