By Adam B. Vary
June 17, 2012 at 12:00 PM EDT

Reality TV star Jack Osbourne has been diagnosed with multiple sclerosis, People reports. The diagnosis of the disease — which affects the brain and spinal cord, and can impair anything from vision and muscle control to cognitive ability — came two weeks after the birth of Osbourne’s daughter, Pearl Clementine, to his fiancée, Lisa Stelly. “I was just angry and frustrated and kept thinking, ‘Why now?’ ” Osbourne, 26, told People for an upcoming issue. “I’ve got a family and that’s what’s supposed to be the most important thing.”

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