England forwards Maro Itoje and George Kruis have signed new contracts with Saracens to remain with the Premiership champions until 2019.
The second-rowers played key roles as England ended a 13-year wait to complete a Six Nations Grand Slam at the start of a new era under head coach Eddie Jones.
Itoje, 21, and 26-year-old Kruis have also played integral roles in Sarries' success and will attempt to inspire the London club to Premiership and European Champions Cup glory in the coming weeks.
The duo have been rewarded for their exploits with new deals to extend their stay with the Premiership leaders, who face Wasps in a European Champions Cup semi-final a week on Saturday.
Saracens director of rugby Mark McCall said: "We are extremely happy that Maro and George have committed their futures to the club.
"Both are part of a core group of players who have progressed from the Academy to establish themselves as key players within the squad.
"They have been in superb form this season for both club and country, they are only going to get better and better, and we're excited about them doing it here at Saracens.
"Maro's progress over the last few seasons has been phenomenal. He's experienced a number of big games for the club already, has played for England and is still only 21 years old, which is incredibly exciting.
"In George, we have one of the finest lock forwards around, a player who has shown consistent improvement year on year and still has so much more to come."