Tickets for the Hammers' away Barclays Premier League game at Chelsea on Wednesday 29 January are now on General Sale.
The Hammers travel across London for the derby duel with Jose Mourinho's men looking to cause a shock against the title contenders.
Tickets are priced from £52 for adults and £23.50 Over-65s and Under-18s and are available from the Club now.
You can buy tickets online by clicking here, visiting the Alpari Stand Ticket Office in person, open 9am-5pm Monday to Saturday, or calling 0871 529 1966*
*Calls cost 10p per minute plus network extras