Meet world record-breaking runner Josh Kerr
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Josh Kerr is one of the fastest runners in the world - and this summer, he made history!
He broke a world record, becoming the fastest person ever to run a mile, with an incredible time of 3 minutes and 42.66 seconds.
Jenny caught up with Josh in the Newsround studio to hear all about the record-breaking moment, how he trains to stay at the top of his game, the role his family plays in his success and what's next for the running star...
Take a look!