Lee Bowyer has joined Coca-Cola Championship promotion-chasers Birmingham City on loan until 9 May.
The midfielder, who turned 32 on 3 January, is expected to make his Blues debut in their home league fixture against Cardiff City on 17 January. He will be reunited with former Scotland defender and Birmingham first-team coach Roy Aitken, who he previously worked with during the pair's time at Leeds United, in the Midlands.
Bowyer has made seven league and cup appearances for West Ham United this season, scoring in the 4-1 Carling Cup first-round win over Macclesfield Town in August. The Poplar-born player joins fellow Hammer Nigel Quashie, who has been on loan at St Andrews since October.