The Middlesbrough midfielder, who celebrates his 25th birthday next week, signed a four-year contract a day after the two clubs agreed terms.

A statement on Villa's official website, www.avfc.co.uk said: "Villa have completed the signing of England international Stewart Downing.

"The four-year deal was finalised after the left-sided star agreed terms and passed a medical.

"Downing becomes Martin O'Neill's first summer signing and adds more quality to the manager's claret and blue squad."