Thomas Tuchel was appointed Chelsea manager on an 18-month contract on Tuesday, tasked with hauling the underperforming Blues back into the Champions League next season.
The 47-year-old German replaces the sacked Frank Lampard to become the 13th Chelsea boss since Russian oligarch Roman Abramovich bought the club in 2003.
Chelsea confirmed on their official website: "Thomas Tuchel has been appointed as the new Chelsea head coach."
Tuchel said: "I would like to thank Chelsea FC for their confidence in me and my staff.
"We all have the greatest respect for Frank Lampard's work and the legacy he created at Chelsea. At the same time, I cannot wait to meet my new team and compete in the most exciting league in football. I am grateful to now be part of the Chelsea family - it feels amazing!"