Shocking and terribly sad news. He'll be unknown to a lot of readers here, but to everyone in the cricket-following world, which is a huge portion of the world, he was a bona-fide superstar. (For context, to Australians and many others around the world, this will be felt as deeply as the passing of Steve Irwin was).
He was one of the biggest names in the game from the early 90s till the mid-00s, and has continued to be a well known figure through the media and on Twitter.
He made his mark with his first-ever delivery for Australia in England, which was dubbed "the ball of the century". It completely bamboozled one of the world's best batters, and was the first of many amazing feats through his career.