Birmingham have completed the £3million signing of midfielder Michel from Sporting Gijon.
The two clubs had agreed a fee and the Blues had negotiated personal terms with the player last week, with the move being finalised after the 24-year-old passed his medical.
Manager Alex McLeish told the club website: “Michel is in a great age group and has got good legs and a lovely touch on the ball as you would imagine from a Spanish player performing at La Liga level.”