Today marked the birthdays of two Chelsea players: Jon Obi Mikel and David Luiz.
To celebrate, the Chelsea players donned their fancy dress clothes for a party and Marko Marin Tweeted the pictures below.
Predictably, there have already been plenty of comments on the choice of costume chosen by the Chelsea squad.
David Luiz endeared himself to Blues fans by dressing up as a Chelsea Pensioner.
Paolo Fereira continued his perenial role as a sidekick by going as Robin (from Batman).
And, did Eden Hazard dress up as team mate Oscar?
Finally, Marko Marin did himself no favours as an Elf!