David Tennant, Andy Serkis and Jim Broadbent headline the cast of a new one-off film based on the story behind the creation of Albert Einstein's general theory of relativity.

Einstein and Eddington, airing later this year on BBC Two, chronicles two men who revolutionised science in the early 20th century.

Serkis will play Einstein while Tennant will portray Arthur Eddington, a British scientist who championed Einstein's theories and helped prove him right.

Filming is currently underway on location in Cambridge, Croatia and Hungary.