Michael Alan Rubin claims the story for 'The Hangover Part II' was stolen from a screenplay he wrote about his disastrous honeymoon in Thailand.

Now, he's suing Warner Bros. for an unspecified amount of money, claiming the sordid tale is his.

According to Rubin, he married a Japanese woman in 2007. However, during their Asian honeymoon she dumped him after learning of his true financial state.

Rubin later turned those misadventures into a script for a movie called 'Mickey and Kirin,' which he says he sent a copy to the Writers Guild of America. He claims the producers of 'The Hangover Part II' lifted elements of that screenplay for their flick.

"The production of 'Hangover II' is not a complete 'literary' or 'artistic' works of the Hangover Defendants as credited in 'Hangover II,'" Rubin, who's representing himself, writes in the complaint. "In fact, the production of 'Hangover II' was a result of infringement of the Plaintiff's treatment 'Mickey and Kirin' and exploitation of the private real life of Plaintiff in an insulting manner."

As for what 'insulted" Rubin, apparently he is miffed that the film suggested he (as Ed Helms' character) had sex with a transgendered prostitute.

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