Azim is a prince of Brunei but he is the king of throwing lavish parties. The 31-year-old multi-millionaire is third in line to the throne.
Pierre Casiraghi, the 26-year-old grandson of Princess Grace, is third in line to the throne of Monaco, after his mother Princess Caroline and his brother, Andrea Casiraghi, 29.
Prince Philippos of Greece is the son of King Constantine of Greece and Queen Anne-Marie of Denmark, so a royal by blood. The 27-year-old is a graduate of Georgetown University and has been known to mingle in Manhattan social circles.
Prince Carl Philip of Sweden is also not exactly single -- he's been living with girlfriend Sofia Hellqvist since 2010, but the 34-year-old royal hasn't popped the question yet so you might say he's still eligible.
Prince Harry is one of the most recognized young royals in the world. The 28-year-old British royal is reportedly dating British model and socialite Cressida Bonas, but is still known getting a bit rowdy.
Prince Wenzeslaus of Liechtenstein, 39, once dated Victoria's Secret model Adriana Lima.