Alexandre Pato has completed his loan move from Corinthians to Chelsea until the end of the campaign.
Speculation had been widespread that the Brazil international would join up with the Premier League champions, with the news confirmed on Friday.
"I am so happy to sign for Chelsea. It is a dream for me. I am looking forward to meeting and getting to know my new team-mates and cannot wait to play," he told the club's official website.
"I thank Chelsea for their support and hope I can repay this faith to the club and its fans."