Modern day midfield great, a Premier League mainstay and champion of multiple titles will no longer be a Blue.
The midfielder, a fundamental part of the club's modern day success, made over 648 appearances as a Blue, is Chelsea's record goalscorer with 211 strikes, twice scored four Premier League goals in a match and has the most combined FA Cup goals for the club - 26.
A fan's favourite, Lampard earned 11 major titles with the club - three Premier League crowns, four FA Cup wins, a brace of League Cup successes and a Champions League and Europa League trophy.
Frank Lampard is quoted by Sky News presenter Kay Burley to have said: "This club has become part of my life and I have so many to thank for the opportunity."
He then began paying his tributes: "[Thanks to] Ken Bates who put his neck on the line to sign me as young player. [To Roman] Abramovich, the man who saved our club and took us to new level. [And a] special mention to all the staff and people behind the scenes who do not receive the glory."
Lampard joined the Stamford Bridge side in 2001 and flourished from season to season. Renowned for his attacking ability, his right foot finishes, fitness and consistency (there have been nine seasons where he competed in 50 or more games), Frank also had under-rated defensive skills.
For over a decade he possessed some of the finest box-to-box play in Europe, his positioning sense was intuitive and he knew how to time a tackle in order to retrieve possession.
His passion has been a staple at SW6, something that enamoured him to the club's ever-growing fan-base.
"Most importantly I would like to thank the Chelsea fans. I believe they are the greatest fans in world football. Whatever the next challenge I will always be among you and have Chelsea in my heart.
"Thank you for the memories Chelsea and keep making history!"
According to Sky Sports sources, Lampard's next move could be to Major League Soccer. He has been allegedly involved in "informal talks" with new franchise New York City. David Villa became the club's first ever signing earlier today.