Even princes and princesses like to party!

Prince Harry and his cousin Princess Eugenie looked a bit disheveled as they left London's trendy Public nightclub early Saturday morning.

Harry, 26, wore a blue button-down shirt with a gray t-shirt underneath, paired with gray denim. His shirt appeared to have drink stains on the right sleeve.

Eugenie, 21, traded her fascinator and prim gown for a frilly dark blue dress and a leather jacket. The princess looked a bit worse for the wear at the end of night, leaving the club with stains on the front of her dress.

According to the Daily Mail, the royal cousins spent several hours at their pal Guy Pelly's trendy club. Pelly, 29, is a longtime friend of Harry and Prince William. He was even in charge of throwing William's "stag" party in March, when about 20 guys celebrated at a friend's country estate for the weekend, including Thomas van Straubenzee and James Meade.