Manchester United have completed the shock signing of Colombia striker Radamel Falcao from Monaco on a season-long loan, the Premier League giants announced in the early hours of Tuesday morning.
"MUFC is delighted to announce Radamel Falcao has joined on a 1-year loan from Monaco with an option to buy," United announced on their Twitter account, alongside a picture of the player posing with a club shirt.
United have reportedly paid Monaco around 10 million euros ($13.1 million) to secure Falcao's services for the season, with an option to make the deal permanent for 55 million euros.
The prolific 28-year-old forward, who missed the World Cup due to a serious knee injury, flew into Manchester to complete a medical examination hours before the transfer window closed on Monday evening.
"I am delighted to be joining Manchester United on loan this season," Falcao said in a statement on the United website.
"Manchester United is the biggest club in the world and is clearly determined to get back to the top.
"I am looking forward to working with (manager) Louis van Gaal and contributing to the team's success at this very exciting period in the club's history."
United had earlier announced the arrival of versatile Netherlands international Daley Blind from Ajax in a deal reportedly worth around £14 million ($23 million, 17 million euros).
They have also sold England forward Danny Welbeck to Arsenal for around £16 million and allowed Mexican striker Javier Hernandez to join Real Madrid on a season-long loan with an option to buy.
Falcao, who has scored 20 goals in 51 appearances for Colombia, has scored two goals in three matches for Monaco this season after making his comeback from a ruptured anterior cruciate ligament.
He will hope to win a place in United's attack alongside Robin van Persie and Wayne Rooney, leaving Van Gaal with a rich pool of striking talent at his disposal.
Van Gaal described Falcao as "one of the most prolific goalscorers in the game".
He added: "His appearance-to-goal ratio speaks for itself and, when a player of this calibre becomes available, it is an opportunity not to be missed."