Reality television star Jack Osbourne, son of Ozzy and Sharon Osbourne, has revealed that he’s been quietly coming to terms with a multiple sclerosis diagnosis. His sister Kelly praised his courage on Twitter:

Via People:

Just two weeks after he and fiancée Lisa Stelly welcomed daughter Pearl Clementine, Osbourne, 26, was dealt the shocking news. In an exclusive, sit-down interview and photo shoot with PEOPLE magazine, Jack and his mother Sharon open up about their emotional ordeal.

“I was just angry and frustrated and kept thinking, ‘Why now?’ ” Jack tells PEOPLE.

As always, a few kind souls couldn’t resist kicking Jack while he’s down.

This Twitter user has protected her account so we can’t embed her tweets, but they’re still available via a Twitter search.

But most of Jack’s followers showered him with support on Twitter. He thanked them for their words of encouragement.

Jack’s mom Sharon retweeted that tweet, but Ozzy has yet to mention his son’s MS diagnosis on Twitter.