Petr Cech has confirmed he has left Chelsea to sign for Arsenal, inking a long-term deal at the Emirates Stadium.
The 33-year-old goalkeeper reported the move via his Twitter account.
He joins the Gunners for an undisclosed fee after 11 years at Stamford Bridge.
Cech became second choice goalkeeper at Stamford Bridge during the 2014-15 season behind Belgium international Thibaut Courtois.
Eager to move to a side where he is guaranteed a first team role, he has joined Chelsea's London rivals where he will almost certainly become the Gunners' new no. 1.
The Czech Republic international was reportedly keen to remain in London due to family reasons but has also praised the role of Arsene Wenger in making the decision easy for him.
"I'm really excited about joining Arsenal and can't wait to join up for pre-season," Cech told Arsenal's official website.
"I have the same commitment to football, the same motivation and the same hunger for success as I had at the beginning of my career, and I love the challenges brought by the top quality players you face while playing in the Premier League. When Arsène Wenger spoke to me about his ambitions for this club, and how he saw me as part of this team, the decision was clear."
Gunners boss Arsene Wenger added: "Petr Cech is a player that I have admired for a long time and I am very pleased that he has decided to join us. He has proven over many seasons that he is one of the outstanding keepers in the world and he will add great strength to our squad."