The 26-year-old centre-back has signed a six-year contract that will keep him at Stamford Bridge until 2032, bringing an end to his two-year spell with Crystal Palace. Chelsea announced the transfer after agreeing a fee reported to be in the region of £52 million (€60 million), making Lacroix one of the club's biggest signings of the summer transfer window. Lacroix joined Crystal Palace in 2024 and quickly established himself as one of the club's key defenders. Crystal Palace, meanwhile, receive a significant transfer fee for one of their standout performers. Lacroix still had three years remaining on his contract, placing Palace in a strong negotiating position throughout discussions with Chelsea.