Raheem Sterling has completed his move to Chelsea from Premier League rival Manchester City, the Blues confirmed.
The England forward moves for a reported fee in the region of £45million and is Chelsea's first major signing since Todd Boehly's consortium acquired the club.
Sterling – who had just one year remaining on his contract at the Etihad Stadium, has signed a five-year deal with Chelsea.
The 27year-old scored 17 goals in all competitions for Pep Guardiola's team last season, a tally only bettered by Riyad Mahrez (24) and Kevin De Bruyne (19), as they conducted a successful defence of their title.
But an exit for the England star always looked possible after City signed Borussia Dortmund star Erling Haaland, with fellow attacker Gabriel Jesus also being allowed to join a Premier League rival in Arsenal earlier this month.
Now, Sterling will link up with Thomas Tuchel's side for their pre-season tour of the United States, as they look to build on a third-placed finish last season.
"First and foremost, it's a pleasure to be here," Sterling told Chelsea's official website.
"I've obviously achieved a lot in my career so far, but there is still so much more to achieve and I'm really looking forward to doing that in a Chelsea shirt, under Thomas's management.
"London is my home and where it all started for me, and it's amazing I now have the opportunity to play in front of friends and family week in, week out at Stamford Bridge. I'm really looking forward to meeting the fans there soon.
"I do want to take the opportunity to thank Todd, Behdad, the ownership group, Thomas, and all involved in the process of getting me here.
"I can't wait to get going now and continue to do my talking on the pitch."
Sterling's move will see him return to London, where he grew up and spent time in QPR's youth system before joining Liverpool as a 15 year-old.
The forward, a key part of the England side that reached the 2018 World Cup semi-finals and the Euro 2020 final, will hope a move to Stamford Bridge provides a guarantee of first-team football ahead of the World Cup in Qatar after he started just 23 of City's 38 league games last season.
Sterling won four Premier League titles, one FA Cup and four Carabao Cups in Manchester after joining from Liverpool in 2015.