Australia centre Anthony Fainga'a is returning to Brumbies after signing a one-year deal with the Super Rugby outfit.
The 29-year-old, a veteran of 23 Tests with the Wallabies, joins twin Saia at the club.
Fainga'a, who has won a Super Rugby championship with Queensland Reds, signs after a spell with Kintetsu Liners in Japan.
"Having the twins returning will bolster our depth in key positions," Brumbies head coach Stephen Larkham said.
"Anthony has long been one of the best defensive centres in Super Rugby, which will be a huge boost for our backline.
"He has the ability to kick goals and play in either centre position.
"Alongside Saia, the twins bring a formidable amount of experience to next year's squad.
"They have great connections with the Queanbeyan and Canberra communities and I think fans will be happy to see them back in Brumbies colours next season."