Bryan Cranston and James Franco are soon to be joining forces for 20th Century Fox's comedy Why Him?

But there was much buzz when it emerged earlier this year that Cranston would be making a cameo in another collaboration with Franco – on the independent feature The Masterpiece.

A film about the making of the brilliantly awful The Room, the 2003 cult hit deemed the worst movie of all time, Cranston was pictured on set in January alongside Franco, who directs and stars in the film, and co-stars Dave Franco and Alison Brie.

And now details have emerged about who exactly Cranston is playing.