Jack Osbourne has just revealed that he has been diagnosed with the autoimmune disease, multiple sclerosis!

The 26-year-old son of rocker Ozzy Osbourne, recently became a father to a baby girl named Pearl with his fiancée Lisa Stelly.

Osbourne revealed that he was diagnosed with the disease just two weeks after the birth of his daughter back in April.

Multiple Sclerosis, or MS, affects the central nervous system causing change of balance, vision and thought processes.

“I was just angry and frustrated and kept thinking, ‘Why now?’” Jack revealed. “I’ve got a family and that’s what’s supposed to be the most important thing.”

It’s all very unfortunate, but Jack’s family has rallied behind him with support.

Sister, Kelly Ossbourne took to her Twitter to tell her followers:

“I keep thinking: ‘What did I do wrong? What did I eat or drink when I was pregnant?’ I feel like it’s somehow my fault,” Sharon Osbourne admitted to Britain’s Hello magazine.

Best wishes Jack!