Chelsea have signed Ivory Coast striker David Datro Fofana from Norwegian champions Molde for a reported £8m-10m.
The 20-year-old, who scored 24 goals in 65 appearances for Molde, has signed a six-year contract until 2029, with the option to extend it by one year.
He is Chelsea's second signing of the January transfer window, following the arrival of France defender Benoit Badiashile for £35m from Monaco.
"I'm very happy to sign for the club of my dreams," said Fofana.
Chelsea described the forward, who joined Molde in 2021 from the Ivory Coast's Amadou Diallo Football Academy, as "a prolific goalscorer and one of European football's most promising young talents".