Inside New York City's hidden neighborhood where Wall Street big shots, celebrities, and billionaire heirs mingle

• New York City's Upper East Side has a hidden neighborhood on East End Avenue where many of the city's richest live.
• Celebrities like Debra Messing and Ricky Martin reside in the area, dubbed 'the suburb of the Upper East Side.'
• Rumor has it the Obamas may be moving in soon.

New York's Upper East Side has long been synonymous with the city's moneyed elite, a century before new towers like 15 Central Park West and One57 became en vogue addresses for the world's millionaires and billionaires.

While Park Avenue and 5th Avenue have always been the most desirable Upper East Side addresses, the neighborhood has a third coveted street known only to those in the know - East End Avenue.

Only 11 blocks long and nestled against the East River, East End has become a secluded neighborhood of its own, one that residents call 'the suburb of the Upper East Side.'

The hidden neighborhood has been the home of heiresses, celebrities, politicians, and billionaires including New York royalty Vincent Astor, Club Monaco founder Joseph Mimram, singer Ricky Martin, baseball player Johan Santana, hedge-funder Arvind Sanger, and actress Debra Messing.

Rumor has it that Barack and Michelle Obama may be buying an apartment in the former building of heiress Gloria Vanderbilt in the neighborhood.

Ed Baquero, president of the Corigin Real Estate Group and the developer of the area's newest building 20 East End, recently gave us a tour of the neighborhood, which he called "a little hidden gem."