Cameron Smith and Queensland's era of State of Origin greats are in contention to become Immortals as soon as August under the NRL's revised hall of fame rules.

The NRL has outlined plans to add a 14th Immortal next month, as part of an expanded hall of fame that would be added to each year.

Previously, players had to be retired for at least five seasons to be considered for rugby league immortality.

However, revised rules announced on Thursday have reduced that time out of the game to three seasons.

As part of the process, the NRL will announce 11 new men's players, six women's players, two coaches, two referees and four contributors to the hall of fame.

Any member of the hall of fame, which currently sits at 110 players, will then be eligible to achieve Immortal status at a ceremony on August 21.

Smith has been retired from rugby league for three and a half years, having played his last game for Melbourne in the 2020 grand final.

Billy Slater is also eligible after retiring in 2018, as is Johnathan Thurston, who retired in the same year.

Cooper Cronk, who won six grands finals but would be unlikely to feature ahead of his Queensland teammates, is also now eligible after his 2019 retirement.

Andrew Johns is the most recent member of the Immortals group, added in 2012.

Mal Meninga and Norm Provan were inducted in 2018, along with three pre-war players in Dave Brown, Frank Burge and Dally Messenger.

Darren Lockyer, Brian Bevan, Duncan Hall, Ken Irvine and Ron Coote were among others to miss out in 2018, and could still be considered.