Lisa Stelly and Jack Osbourne

Jack Osbourne has married the mother of his daughter, Lisa Stelly, People reports.

The 26-year-old son of Sharon and Ozzy Osbourne wed his girlfriend in Hawaii on Sunday in front of friends and family members, including his sister Kelley Osbourne, who was one of Lisa's bridesmaids.

Jack Osbourne has multiple sclerosis

Earlier this year, Osbourne announced he had been diagnosed with multiple sclerosis. He learned of his diagnosis just two weeks after he and Stelly welcomed their daughter, Pearl, in June. The couple got engaged last September.