Josh McEachran and Ryan Bertrand have signed new long-term deals with Chelsea.
Midfielder McEachran has put pen to paper on a five-year contract while left-back Bertrand has signed a four-year deal.
The England Under 21 pair came through the club's academy and both made their first-team debuts last season.
McEachran, 18, was named Chelsea's young player of the year after making 17 appearances last term, including four starts.
"It is good to be offered this sort of contract," he told the club's official website. "Hopefully I will spend my career at Chelsea.
"I have wanted to do that since I was a kid, since I joined when I was eight years old. It will be good if I do but I need to keep working.
"This season my target is just to play more minutes. Hopefully I will play more games and keep improving."
Bertrand, who turns 22 next month, was lured to Chelsea from Gillingham in July 2005 and has since joined five clubs on loan.
Although he has played just one game for Chelsea, coming off the bench in April's 3-1 win over Birmingham, that was his 146th league appearance.
A host of clubs have been interested in taking Bertrand on loan next term but he aims to stay at Stamford Bridge and impress new boss Andre Villas-Boas after committing his long-term future to the Blues.
"It's a big commitment, I see the club going in the right direction," Bertrand added. "I want to stay here, it's the reason I came here six years ago and it's refreshing to have the new manager come in. I'm looking forward to listening and learning from him.
"I can see the manager is young and hungry and wants to take the club forward so I want to be part of that and I thought it was best for me to stay.
"Obviously Ashley (Cole) is number one left-back but hopefully I can get a game here and there.
"I hope to stay here this season and hopefully catch the manager's eye."