Luke Shaw has become the most expensive teenage footballer in history after he completed his £27million move to Manchester

England international Luke Shaw, left, has swapped Southampton for Manchester United

Luke Shaw has become the most expensive teenage footballer in history after he completed his £27million move to Manchester United.

Shaw, 18, passed a medical at the club's Carrington training ground on Thursday evening and the following day he signed a four-year contract, with the option of another year.

The deal is understood to be worth £27million, plus add-ons. That figure eclipses the £25.6million fee United paid for Wayne Rooney in 2004.

"Manchester United is delighted to announce the signing of Luke Shaw from Southampton Football Club," a United statement read.

.@LukeShaw3 joins @AnderHerrera8 as an #mufc player. Welcome to the club! Full story: http://t.co/xCBqiqNPmI pic.twitter.com/NR4acNQuNS

— Manchester United (@ManUtd) June 27, 2014

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