Donald Trump is suing a comedian for failing to honour a $5million (£3.1m) bet which relied on the mogul proving he is not the son of an orangutan.

Bill Maher had an ongoing joke that until he saw a birth certificate proving otherwise, he believed Trump to be the offspring of the businessman's mother and an orangutan.

In January, he told Jay Leno that he would donate $5 million to charity if Trump could produce a birth certificate proving his true parentage.

donald trump

'I am not the son of an orangutan': Donald Trump has supplied proof he is not related to the great ape

Trump responded by publicly releasing his birth certificate to Yahoo! News, with a letter from his lawyer that said in part, "Attached hereto is a copy of Mr. Trump's birth certificate, demonstrating that he is the son of Fred Trump, not an orangutan."

Maher has not not coughed up, prompting Trump to file legal documents on Monday.

The paperwork was filed in the Superior Court of California and is available via the TMZ website.

In it Trump demands a jury trial and accuses Maher of depriving "five worthy charities" of much needed funds. The charities include a Hurricane Sandy relief organisation, the Police Athletic League, the American Cancer Society, March of Dimes and the Dana-Farber Cancer Institute.

"He promised me $5 million for charity if I provided certain information," Trump said over the phone to the "Fox & Friends" hosts. "I provided the information. He didn't pay. So today I sue Bill Maher for $5million for charity."

He also doubted the defense that Maher, a well-known comedian, was making a joke on "The Tonight Show," because Trump found his delivery "pathetic."

Is Trump blowing this out of proportion, or should Maher pay up? Let us know in the comments.

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