Victor Moses has said that he is "very pleased" to have joined West Ham United on a season-long loan.
The 24-year-old told West Ham's website: "I am very pleased to have joined West Ham. They are a great club and the atmosphere here is amazing with the fans.
"I want to add my quality to what West Ham already have and hopefully we can do even better than last season. I am very pleased to work under the new manager (Slaven Bilic). There is a huge amount of talent with Alex Song and Nikica Jelavic joining the club and I want to help the club finish as high up in the table as possible.
"Andy Carroll is a great striker and has a lot of experience in the Premier League. All the forwards have got a lot of experience and I want to help them score more goals."
Moses has previously had loan spells with Liverpool and Stoke City since joining Chelsea from Wigan Athletic in 2012.