Will you be the lucky fan walking away with a signed shirt with Lionside Football - the club's official Facebook game.
Make sure you have a chance of winning this amazing prize by logging onto your Facebook account and start playing (and beating!) fans of all the Barclays Premier League teams before the end of today in the Lionside Cup.
Lionside Football is one of the most popular games on Facebook, and one lucky Hammers fan will win this amazing prize. If you have not yet signed up for the game already, it is easy to get started and completely free, so register on Facebook today.
Select the Lionside Cup feature (unlocked at Level 8) to enter the competition, and keep an eye out for limited edition Hammers boosts and the chance to pick actual first team players in your team!
Click here now for your chance to win.