Facebook's billionaire CEO Mark Zuckerberg recently claimed in an interview that he wears the same clothes every day.

Now we can prove it.

In an interview with NBC following the social networks 'billionth user' announcement, Zuckerberg said not only does he only wear one type of T-shirt, he only has one drawer to keep them in.

"I mean, I wear the same thing every day, right? I mean, it's literally, if you could see my closet," Zuckerberg said, adding that he owns "maybe about 20" of the grey shirts for which he is famous.

"I have one drawer," Zuckerberg said. "Like men everywhere. Like men everywhere."

In 2011 the 28-year-old was named on the worst dressed lists of both GQ and Esquire.

And even though Zuckerberg recently married, owns a large home in Palo Alto, California, and is worth more than $9.4 billion, he said he doesn't have ambitions to dress with more panache.

Admittedly he was recently pictured wearing a suit - but then he was also meeting the prime minister of Russia at the time...

Usually though it's the same old hoody and T-shirt - take a look at our slideshow for proof (below).

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  • Facebook Executives Reveal New Features For Popular Social Networking Site

    PALO ALTO, CA - AUGUST 18: Facebook founder and CEO Mark Zuckerberg speaks during a news conference at Facebook headquarters August 18, 2010 in Palo Alto, California. Zuckerberg announced the launch of Facebook Places, a new application that allows Facebook users to document places they have visited. (Photo by Justin Sullivan/Getty Images)

  • Facebook Executives Reveal New Features For Popular Social Networking Site

    PALO ALTO, CA - AUGUST 18: Facebook founder and CEO Mark Zuckerberg talks with reporters after speaking at a news conference at Facebook headquarters August 18, 2010 in Palo Alto, California. Zuckerberg announced the launch of Facebook Places, a new application that allows Facebook users to document places they have visited. (Photo by Justin Sullivan/Getty Images)

  • Facebook Makes Announcement At Its Palo Alto Headquarters

    PALO ALTO, CA - OCTOBER 06: Facebook founder and CEO Mark Zuckerberg (R) looks on before speaking at a news on October 6, 2010 in Palo Alto, California. Zuckerberg announced the addition of a revamped personal groups feature and the ability to download everything you have posted to Facebook. (Photo by Justin Sullivan/Getty Images)

  • Facebook Makes Mobile Announcement At Its Headquarters

    PALO ALTO, CA - NOVEMBER 3: Facebook social network founder and CEO, Mark Zuckerberg speaks at a press conference at Facebook headquarters on November 3, 2010 in Palo Alto, California. Zuckerberg announced a new mobile Facebook platform that will unify it's mobile site but anxious rumors of a Facebook phone were not confirmed. (Photo by Kim White/Getty Images)

  • Facebook Announces New Email Messaging System

    SAN FRANCISCO - NOVEMBER 15: Facebook founder and CEO Mark Zuckerberg speaks during a special event announcing a new Facebook email messaging system at the St. Regis Hotel on November 15, 2010 in San Francisco, California. Facebook will launch a new messaging system aimed at enhancing it's social media product to its 500 million users. (Photo by Justin Sullivan/Getty Images)

  • Facebook Reveals Latest Technology Powering Its Website

    PALO ALTO, CA - APRIL 07: Facebook CEO Mark Zuckerberg (R) smiles before speaking at a media event at Facebook headquarters on April 7, 2011 in Palo Alto, California. Facebook announced the launch of the Open Compute Project that will open-source the specs of its new server and data center design. (Photo by Justin Sullivan/Getty Images)

  • Mark Zuckerberg Announces Facebook Video Calling

    PALO ALTO, CA - JULY 06: Facebook CEO Mark Zuckerberg (R) and Skype CEO Tony Bates (L) speak during a news conference at Facebook headquarters July 6, 2011 in Palo Alto, California. Zuckerberg announced new features that are coming to Facebook including video chat and a group chat feature. (Photo by Justin Sullivan/Getty Images)

  • CEO's And Corporate Executives Gather For Annual Allan And Co Gathering In Sun Valley

    SUN VALLEY, ID - JULY 07: Facebook CEO Mark Zuckerberg (L) chats with LinkedIn CEO Jeff Weiner, at the Allen & Company Sun Valley Conference on July 7, 2011 in Sun Valley, Idaho. The conference has been hosted annually by the investment firm Allen & Company each July since 1983. The conference is typically attended by many of the world's most powerful media executives. (Photo by Scott Olson/Getty Images)

  • Facebook CEO Mark Zuckerberg delivers a

    Facebook CEO Mark Zuckerberg delivers a keynote during the Facebook f8 Developer Conference at the San Francisco Design Center in San Francisco on September 22, 2011 in California. AFP PHOTO / Kimihiro Hoshino (Photo credit should read KIMIHIRO HOSHINO/AFP/Getty Images)

  • Facebook CEO Mark Zuckerberg delivers a

    Facebook CEO Mark Zuckerberg delivers a keynote during the Facebook f8 Developer Conference at the San Francisco Design Center in San Francisco on September 22, 2011 in California. AFP PHOTO / Kimihiro Hoshino (Photo credit should read KIMIHIRO HOSHINO/AFP/Getty Images)

  • A woman watches Facebook founder and CEO

    A woman watches Facebook founder and CEO Mark Zuckerberg speaking in a promotional video ahead of the company's IPO, in Washington on May 8, 2012. Facebook, already assured of becoming one of the most valuable US firms when it goes public later this month, now must convince investors in the next two weeks that it is worth all the hype. Top executives at the world's leading social network have kicked off their all-important road show on Wall Street -- an intense marketing drive ahead of the company's expected trading launch on the tech-heavy Nasdaq on May 18. AFP PHOTO/Mladen ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/GettyImages)

  • Corporate And Media Leaders Attend Allen & Company Media And Technology Conf.

    SUN VALLEY, ID - JULY 11: Facebook CEO Mark Zuckerberg (L), software engineer Marc Andreesen and his wife Laura Arrillaga- Andreesen, chairwoman of the Silicon Valley Venture Fund, attend the Allen & Company Sun Valley Conference on July 11, 2012 in Sun Valley, Idaho. The conference has been hosted annually by the investment firm Allen & Company since 1983 and is typically attended by many of the world's most powerful media executives. (Photo by Kevork Djansezian/Getty Images)

  • Corporate And Media Leaders Attend Allen & Company Media And Technology Conf.

    SUN VALLEY, ID - JULY 12: Facebook CEO Mark Zuckerberg speaks with Washington Post Chairman and CEO Donald Graham during the Allen & Company Sun Valley Conference on July 12, 2012 in Sun Valley, Idaho. The conference has been hosted annually by the investment firm Allen & Company each July since 1983. The conference is typically attended by many of the world's most powerful media executives. (Photo by Kevork Djansezian/Getty Images)

  • Corporate And Media Leaders Attend Allen & Company Media And Technology Conf.

    SUN VALLEY, ID - JULY 12: Mark Zuckerberg, (L) chief executive officer and founder of Facebook Inc., speaks with Donald Graham (C), chief executive officer and Chairman of The Washington Post Company, and Reed Hastings, CEO of Netflix, during the Allen & Company Sun Valley Conference on July 12, 2012, in Sun Valley, Idaho. The conference has been hosted annually by the investment firm Allen & Company each July since 1983. The conference is typically attended by many of the world's most powerful media executives. (Photo by Kevork Djansezian/Getty Images)

  • Tech:Crunch Disrupt SF 2012

    SAN FRANCISCO, CA - SEPTEMBER 11: Facebook CEO Mark Zuckerberg speaks to the TechCrunch Disrupt SF 2012 conference on September 11, 2012 in San Francisco, California. (Photo by Max Morse/Getty Images)