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.

Loading Slideshow...
  • Trump Teas

    Trump launched a line of premium teas priced at <a href=""> $12.95 per tin.</a> The blends include: Park Avenue, Union Square, Westchester and Mar-a-Lage.

  • Trump ICE

    Yes, the Don introduced a bottled water line made from "<a href="" target="_hplink">purest natural spring water</a>."

  • Trump Magazine

    After several failed attempts to build a profitable eponymous magazine, the Donald finally <a href="" target="_hplink">shut down his editorial venture last Ma</a>y.

  • Trump Steaks

    <a href="" target="_hplink">Trump Steaks</a> come in a combination of cuts, are available in 'collections' and shipped frozen on dry ice to anywhere. 4- 5 ounce cuts of Fillet Mignon will run you $99.95.

  • Trump: The Board Game

    First introduced in 1989, the <a href="" target="_hplink">Trump board game</a> lets players negotiate the sale of fictional real estate properties. (Pictured is a Parker Brothers version of the game from 2004.)

  • Trump University

    Donld Trump charges people up to $35,000 to "learn from the master" at <a href="" target="_hplink">"Trump University."</a> New York state officials recently accused Trump of <a href="" target="_hplink">breaking the law</a> by calling his cyber-school a "university." Trump's educational venture has also been hit with complaints from more than 150 students who claim Trump cheated them out of tens of thousands of dollars, <a href="" target="_hplink">reports the <em>NY Daily News</em></a>.

  • Trump Golf Holdings

    <a href="" target="_hplink">Trump Golf Courses </a>can be found across the U.S. in places like Florida and New Jersey and outside the country in Scotland and the Caribbean. Donald's controversial development in Aberdeen Scotland is pictured above. Now, he reportedly has his eyes on a <a href="" target="_hplink">North Carolina course</a>.

  • Trump Vodka

    Care for a "<a href="" target="_hplink">Trumptini</a>?" The real-estate mogul makes his own premium brand of vodka, starting at around $30 a bottle.

  • Trump Model Management

    Based in Soho, Trump Model Management is considered by <a href="" target="_hplink">All About Models</a> to be the 10th best modeling agency in New York City.

  • Trump Home Furniture Line

    Now design your property just like the master of real-estate with <a href="" target="_hplink">Trump's line </a>of bedroom sets, dining room tables, dressers -- you name it.