Thiago Silva has completed his free transfer move to Chelsea from Paris Saint-Germain.
The 35-year-old has signed a one-year Stamford Bridge contract, with the club holding the option of adding another 12 months.
Silva's addition will help manager Frank Lampard restructure his defence and follows Wednesday's £45million capture of England left-back Ben Chilwell from Leicester.
Silva's age profile represents a clear departure from Chelsea's usual protocol of focusing major signings on players edging towards or already in the prime of their careers.
But Lampard's desire for a leader at the heart of his defensive reshuffle has proved critical in the cool-headed PSG icon's arrival.
The vastly-experienced Silva wasted no time in marking out his desire for trophies on his Stamford Bridge switch.
"I am so happy to be joining Chelsea, I am delighted to be a part of Frank Lampard's exciting squad for next season and I'm here to challenge for honours," said Silva.
"See you soon Chelsea fans, I look forward to playing at Stamford Bridge very soon."
