Financial details were not disclosed but British media reported West Ham paid an initial fee of around 10 million pounds for the German who made 34 appearances for PSG in all competitions last season.

Kehrer is capable of playing either as a centre back or as a full back while he has also been deployed as a defensive midfielder.

"He's a talented player, who can play in a number of defensive positions, adding strength and depth to our current options," West Ham boss David Moyes said in a statement.

Kehrer has also been a regular starter for Germany ever since Hansi Flick took over the national team last year.

"This is the best league in the world and I'm excited about coming to play in the Premier League," Kehrer said.

"I talked to the manager and he told me about how he sees me fitting in at the club. My biggest goal now is to get into the team, integrate myself within the group and enjoy playing for West Ham."

Kehrer is West Ham's sixth signing since the close season after defender Nayef Aguerd (26), goalkeeper Alphonse Areola (29), centre forward Gianluca Scamacca (23), winger Maxwel Cornet (25) and midfielder Flynn Downes (23).

Aguerd, who joined the club in a 30 million pounds deal, was forced to undergo ankle surgery after sustaining an injury in their pre-season friendly against Rangers last month.

West Ham are 19th in the Premier League standings after defeats in their opening two games of the season. They next play Danish side Viborg in the first leg of the Europa Conference League playoffs on Thursday.