Saracens have confirmed that brothers Mako Vunipola and Billy Vunipola have signed "multi-year" contract extensions with the club.
Mako, 24, moved to Sarries from Bristol in 2011, while 22-year-old Billy arrived at Allianz Park from Wasps in 2013.
The pair, who are both forwards, have won 37 caps between them for the England national team. Mako was part of the British and Irish Lions squad that toured Australia in 2013.
"We're delighted that Mako and Billy have extended their contracts with club," director of rugby Mark McCall told Saracens' official website. "The pair of them are both under 25, and they are the cornerstones of a very exciting pack of young forwards for this club.
"They bring a huge amount on the pitch, and both have achieved an incredible amount in such a short space of time. They also contribute off the field in terms of the group and the environment at the club. We're very happy that they both see their future here at Saracens."
Saracens return to Aviva Premiership action on Sunday when they entertain Exeter Chiefs.
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