The crowd figure has surpassed the previous biggest NRL crowd since Darren Lockyers farewell match in Round 26 of season 2011 (50,859) at Suncorp Stadium in Brisbane.
Yesterdays (Friday's) match was also the biggest Sydney Rugby League crowd since the Souths vs St George match at the Sydney Cricket Ground in 1967 with 50,153.
It also went past the Nathan Hindmarsh/Luke Burt/Ben Hornby/Dean Young farewell game in 2012 between the Eels and Dragons which 45,863 fans attended.
NRL CEO Dave Smith paid tribute to both the Bulldogs and Rabbitohs clubs for working together to provide an event that captured the imagination of fans.
It was a fantastic game of football and I want to thank the fans of both teams for creating a wonderful atmosphere, Mr Smith said.
Its the biggest crowd for a stand-alone regular season game in the NRL and a sign of the excitement in this years competition.