Victor Moses has signed a new contract at Chelsea and joined West Ham on a season-long loan deal.
The winger spent last season at Stoke City, scoring three goals in 19 Premier League appearances, and will feature at Upton Park this term, having also agreed a new four-year deal with his parent club.
Moses arrived at Chelsea from Wigan Athletic in 2012 but failed to command a first-team berth at Stamford Bridge.
Prior to his stint at Stoke, the 24-year-old had a season on loan at Liverpool although he found his opportunities limited thanks to the form of Raheem Sterling.
Moses becomes West Ham s second acquisition of transfer deadline day following the signing of Alex Song, also on loan.