Jack Osbourne Diagnosed With Multiple Sclerosis

Access Hollywood
Jack Osbourne steps out at the First-Ever Call of Duty XP at the Stages at Playa Vista in Los Angeles on September 3, 2011 -- Getty Images

New dad Jack Osbourne has revealed that he's been diagnosed with multiple sclerosis.

"I was just angry and frustrated and kept thinking, 'Why now?'" the 26-year-old told People.

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MS is a disease that affects one's central nervous system, including the brain and spinal cord. It can also take its toll on muscle control, balance, vision and thinking.

"I've got a family and that's what's supposed to be the most important thing," Jack, who only two weeks ago welcomed daughter Pearl Clementine with fiancee Lisa Stelly, told the mag.

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The severity of MS differs with each individual, with some only encountering minor problems and others becoming disabled.

On Sunday night, Jack thanked his fans for their support on Twitter.

"Thank you all so much for the kind and inspirational words. It means a lot. ‪ #adaptandovercome," he wrote.

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