Chelsea fans look away now. Juan Mata - the Blues player of the year for the last two years - will be paraded at Old Trafford dressed in red later.
The Spaniard has been given the famous number seven shirt. Previous wearers of the shirt include George Best, Eric Cantona, David Beckham and Cristiano Ronaldo.
The 25-year-old left Stamford Bridge after falling out of favour with Jose Mourinho. The Chelsea manager played Brazilian internationals Oscar and Willian, and Belgium winger Eden Hazard ahead of Mata.
At £37 million, Mata becomes Manchester United's most expensive signing and is set to make his Old Trafford debut against Cardiff City on Tuesday.