The four Burgess brothers will remain at South Sydney for some time to come after twins George and Thomas both signed new deals.
With elder siblings Luke and Sam tied up to the club until 2015 and 2016 respectively, 21-year-olds George and Thomas penned new contracts this morning.
George, who made his debut for Russell Crowe's club last season, has signed until 2016, while Thomas, who joined his brothers this year after completing a spell with Bradford, will remain until 2015.
The quartet's form has been so impressive that it has been speculated all could be selected by England coach Steve McNamara for this year's World Cup, with Sam and George seeming certain picks.
"It's really exciting to be with a club that is growing the way it is, and I'm looking forward to helping develop the winning culture that is building here," George Burgess said.
"I'm really pumped to be part of it with my brothers and team-mates as well, and to be part of what I'm sure will be a bright future."
The same goes for Thomas Burgess, who made his debut last month.
"It's great to know I'll be here for at least two more years, at such a wonderful club," he said.
"I'm so happy to be playing alongside my team-mates, including my three brothers, and I'm looking forward to playing my part in creating something special here over the coming seasons."
Sam Burgess was the first of the four to head down under in 2010, with Luke joining him a year later.