"I've loved playing for this club, it's been perfect for me and my career and I want to be here for a long time to come. I couldn't be happier," Drinkwater told the club website (www.lcfc.com).
"I've grown a lot as a player and a person in the last four years and Leicester City has been a massive part of that. I owe a lot to the staff here for helping me get to this point -- they've been quality."
The 26-year-old joins the likes of Riyad Mahrez, Jamie Vardy, Kasper Schmeichel and Wes Morgan in committing their long-term futures to the club.
Leicester, who are searching for their first league win of the season, host Swansea City on Saturday.
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(Reporting by Nivedita Shankar in Bengaluru; editing by Amlan Chakraborty)
