Life ‘Young and the Restless’ star Kristoff St. John dead at 52, cause ‘deferred’ February 4, 2019February 4, 2019 Anika Reed, USA TODAY Comments Off on ‘Young and the Restless’ star Kristoff St. John dead at 52, cause ‘deferred’ Kristoff St. John, star of 'Young and the Restless,' has died at 52.