Clinton and Giamatti are joining The Hangover 2.The Hangover 2 may have lost out on 'the greatest cameo never filmed' when Mel Gibson quit the project, but they're certainly making up for it.

Bill Clinton and Paul Giamatti have both been revealed to star in the comedy sequel.

Deadline reports that Sideways' Giamatti will star alongside Liam Neeson and Juliette Lewis in the growing A-List cast, while original stars Bradley Cooper, Zach Galifianakis, Ed Helms and Ken Jeong's Mr Chow are all locked down to reprise their roles.

Intriguingly, and potentially hilariously, former US President Bill Clinton has also been seen on set, with TMZ reporting that Clinton starred in a scene that saw him jumping into a rickshaw with Cooper and Galifianakis.
 

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