JackOsbourne092911_230.jpgOzzy Osbourne's son is officially off the market!

Jack Osbourne is engaged to actress Lisa Stelly, his rep confirms to X17online.

Though the Prince of Darkness' youngest kid has been through his fair share of drug and alcohol abuse, he has largely kept behind the scenes since the entire family shot to fame on MTV's reality show The Osbournes in 2002. Jack, 25, is now a director and has worked on both Ozzy's music video for the song "Life Won't Wait" and the documentary film God Bless Ozzy Osbourne.

And his relationship is proving to be a stable force as well. "It's just no drama. More stable," a source told Us Weekly about Jack's relationship with Lisa.

This is Jack's first marriage.