Dally M Female Player of the Year Brittany Breayley and Kiwi Ferns trio Kimiora Nati, Maitua Feterika and Teuila Fotu-Moala have joined the Dragons.

All four players were instrumental in the Brisbane Broncos' inaugural Women's Premiership grand final win last year.

"It's massive day for the St George Illawarra Dragons to be able to announce these signings. This plays into our vision with what we want to achieve as a club in the Women's Premiership," coach Daniel Lacey said.

Breayley will bring significant experience to the Dragons' spine being a Jillaroos and Queensland representative and is considered one of the best hookers in the game.

"There's no doubting she'll add several strings to our bow and change the way we approach games. We are very excited by what she'll bring to the team and I think she can get even better, which is a scary thought for opposition teams."

Experienced playmaker Nati grand final hat-trick helped the Broncos to the Premiership and saw her awarded the Karyn Murphy Medal for best on ground.

The dual Cook Islands and New Zealand international will prove the perfect foil for fellow Women's Premiership signing Maddie Studdon in the halves.

Tongan and New Zealand dual international Fotu-Moala's recent move to Sydney has paid dividends while Feterika is capable of playing in numerous positions.

The Dragons' four latest Women's Premiership signings for 2019 leaves the club with five spots to be announced ahead of September's competition.

St George Illawarra's NRLWomen squad (so far):Kezie Apps, Shaylee Bent, Brittany Breayley, Keeley Davis, Aaliyah Fasavalu-Fa'amausili, Maitua Feterika, Teuila Fotu-Moala, Rikeya Horne, Takilele Katoa, Kimiora Nati, Tiana Penitani, Jessica Sergis, Maddie Studdon, Shakiah Tungai, Botille Vette-Welsh, Maddison Weatherall, Holli Wheeler