Drinkwater signed a five-year contract at Stamford Bridge with just hours to spare before the summer transfer window closed.
The England international is now Leicester’s club-record sale, surpassing the £32m the Foxes received from Chelsea for N’Golo Kante last year.
The London club posted pictures of Drinkwater holding a home shirt and shaking hands with technical director Michael Emenalo on their Twitter account.
Manager Antonio Conte had a busy deadline day, with Davide Zappacosta also joining from Torino as Chelsea secured their fifth and sixth signings of the summer.
Scroll through the gallery above to see the best pictures as Danny Drinkwater is unveiled as a Chelsea player.