Dallas Buyers Club star Matthew McConaughey has invested in sleeping and relaxation app Calm, and lends his voice to one of its 'sleep stories' about 'the mysteries of the universe', titled Wonder.

Nicholas Head, Executive Producer at Calm, commented 'Since the launch of Sleep Stories, Matthew McConaughey’s famously soothing voice has been a top request from our users. We’re thrilled to announce you can finally drift off to sleep as his legendary voice reads you an epic bedtime story within the Calm app'.