Springbok legend Schalk Burger will join Saracens next season, having signed a two-year deal with the Aviva Premiership club.
Burger, 32, has won 86 caps for South Africa and was part of the squad that reached the semifinals of the 2015 Rugby World Cup.
The flanker, who is a former IRB world player of the year, has also captained his country and will head to Allianz Park once he has completed spells with Japanese club Suntory Sungoliath and Super Rugby's Stormers.
"I'm delighted to be joining Saracens. I'm extremely excited to have the opportunity to play in both the Aviva Premiership and the European Cup, two of the leading competitions in world rugby for such a special club," Burger, South Africa's record back-row try scorer with 14, said.
"It's an exciting challenge for me and my family and hopefully I can add a lot of value both on and off the field to an already successful group of players and coaches. I'm looking forward to playing alongside my new teammates and playing in front of all the Saracens fans and getting to know everyone at Allianz Park."
Burger's arrival at Saracens will cover for the loss of Ernst Joubert and Jacques Burger, both of whom are due to exit the club at the end of the current campaign.
Saracens director of rugby, Mark McCall said: "Schalk is a Springbok legend, and will add a huge amount of experience and quality to our young English pack of forwards at the club.
"We have always talked about having the right blend of experience and youth in our squad, so to be able to add one of the world's finest players to the group is extremely exciting news."