Pippa Middleton smooches beau in public

Pippa Middleton broke millions of hearts, by publically smooching her beau recently. Dressed in a stunning low-cut red gown, Prince William's sister-in-law arrived for charity gala at London's Plaza Hotel with her boyfriend Alex Loudon.  Middleton, 27, and Loudon, 30, left

the venue exhausted at 4am and cuddled cozily while waiting for their pick-up. Middleton was snapped puckering up for early morning smooch and lovingly cuddling up to her man. The couple's early morning PDA, put to rest speculation about the state of their relationship.

Pippa and Alex, a former cricketer, have been dating for the past three years.

The event was also attended by ex-Spice Girl Geri Halliwell, Prince Harry's former girlfriend Chelsy Davy and Princesses Beatrice and Eugenie.