Older brother of British YouTube star Phil Lester who works closely with the talent of YouTube. He has over 40,000 Twitter followers and more than 60,000 Instagram followers. His username on both platforms is mookentooken.
He and Phil attended Bacup and Rawtenstall Grammar School.
He was featured in Shook Magazine in May of 2010.
He became the manager of his brother's online shop. He has been dating singer Cornelia Dahlgren. In December 2020, they welcomed their first child together, a daughter named Freja.
His brother co-hosted a BBC Radio 1 entertainment show with Dan Howell.