He may be nearly a teenager and heading off to secondary school , but Prince George was once the cutest little prince in gingham pajamas. In a memorable meeting between the then-Duke and Duchess of Cambridge, Prince Harry , and President Barack Obama and First Lady Michelle Obama , Prince George snuck out past his bedtime to meet the historic president. Prince Harry, Princess Kate, and Prince William hosted President Obama and First Lady Michelle Obama at Kensington Palace. (Image credit: Getty Images) Just your average dinner party. (Image credit: Getty Images) President Obama and his wife, First Lady Michelle Obama, visited the UK during their final year in office to celebrate the strong relationship between the US and the UK. Among the special events included in the trip was a private dinner at Kensington Palace , the Duke and Duchess of Cambridge’s family home at the time. President Obama’s photographer, Pete Souza, was on-hand to document the evening and the adorable, unexpected meeting of icons.…