Stephen Hawking has had the same trademark voice for 30 years and has now decided it's time for a change. Watch him view the audition tapes from hopeful celebrities... Written by Daniel Audritt, Kat Butterfield, Jon Aird and the cast. Subscribe ► bit.ly/1gXbQkj Visit Us ► comicrelief.com Facebook ► facebook.com/comicrelief Twitter ► twitter.com/comicrelief ------------------------------------------- Thanks for all your support - sharing the video and leaving a comment is always appreciated. Please respect each other in the comments! Donate: www.comicrelief.com/donate Our mission is to drive positive change through the power of entertainment. © Comic Relief 2017. Registered charity 326568 (England/Wales); SC039730 (Scotland)