Last night stars gathered at the Waldorf Astoria Hotel for The Viennese Opera Ball, an annual fundraising gala, in New York City. "The Viennese Opera Ball in New York is an annual charity gala held annually under the auspices of the United States-Austrian Chamber of Commerce. Dignitaries, Diplomats and Debutantes 'Open' the international Ball, long regarded as one of New York City’s 'greatest annual events,' garnering worldwide media coverage for over five decades. There is nothing formulaic about the event; with four generations of guests, the Ball reflects the universal appeal of Austria’s cultural and culinary treasures. The gala evening features Opera, Classical Music and Ballroom Dancing including, of course, Waltzing. One popular highlight is the Midnight Quadrille, conducted by a Viennese choreographer. Following an 8 p.m. champagne reception, the Ball runs from 9:00 p.m. to 1:00 a.m., and includes a four-course dinner service. The 'Tanz Bar' (post-Ball party) follows from 1:00 to 4:00 a.m. and includes a full buffet supper with the Viennese Opera Ball's Signature Goulash Soup, as well as multiple venues featuring: a Jazz Band, Dance Band, DJ, Vienna Coffee House with Viennese pastries, and Casino. The Ball opens with the Grand March of Dignitaries and Diplomats. The ceremonial tone of the Ball Opening continues with the Presentation and Posting of the Flags by a West Point Color Guard. The Program continues with the Presentation of Debutantes (ages 16 to 25) and their dance Escorts (ages 18–30). A choreographed waltz routine by young ballroom dance couples (ages 18–30) is followed by a call for 'Alles Walzer!' (Everyone Dance!) and guests join the dancers for the first official waltz of the Ball. Peter Duchin and his Orchestra play continuous dance music throughout the Ball, stopping only for Program highlights or performances by the featured Opera singers." [Source] For more information about The Viennese Opera Ball, click here. See more photos of Alyson Cambridge, Sherrill Milnes, Linda Watson, Thomas Robert, Omar Sharif Jr., Amy Shoremount-Obra, Melissa Batalles, and more, after the jump.