Tom Burgess has been locked into the cardinal and myrtle on a bumper extension the same length as that of his brother Sam, re-signing with the Rabbitohs until the end of 2023.
Burgess's recommitment sees the 26-year-old commit possibly the rest of his playing career to South Sydney, as he will be 31 when he next comes off-contract.
The news of Tom's re-signing comes just a week after twin brother George knocked back an attractive offer from rivals Parramatta.
NRL.com reported that the Eels' bid to sign George for 2019 had been close to completion until it fell over at the last minute, though whether the Rabbitohs will keep both twins remains to be seen.
Since arriving at South Sydney in 2013, Burgess has made 113 appearances for the foundation club, and is now slated to form the long-term backbone of their pack alongside older brother Sam.
"Souths is all I've known and I'm really pumped to be signed up long term now," Burgess said in a club statement.
Tom Burgess extends South Sydney stay
"The club gave me a chance when I came to Australia for the first time, a 20-year-old young lad, not knowing what to expect. Now six or seven years down the track, I'm still enjoying my football here.
"I love calling Sydney home and I wouldn't want to play anywhere else in the NRL than with the Rabbitohs."
Burgess's re-signing continues a series of seismic roster moves at Redfern since Wayne Bennett's arrival.
As well as Burgess, star hooker Damien Cook and the club's most-capped player John Sutton have both had their tenures extended, while Liam Knight and Corey Denniss have been signed from Canberra and Newcastle respectively.