Perry has won the NRL with both Newcastle and Manly
St Helens have signed Australia international prop Josh Perry from Manly Sea Eagles.
The 29-year-old former Newcastle Knights man has signed a three-year deal that will commence at the beginning of next season.
"I'm really looking forward to joining St Helens and in particular playing alongside fellow prop James Graham," said Perry.
"Saints are a club with a long and proud history and a winning culture."
Perry continued: "I've been fortunate enough to play in NRL Grand Final-winning teams at both Newcastle Knights and Manly Sea Eagles and it's my ambition to do the same in England.
"My team-mate Jamie Lyon tells me he had two of the best years of his life at St Helens and I hope it's the same for me."
St Helens chairman Eamonn McManus added: "Josh is one of the leading front-rowers in the game and will add size and presence to our pack.
"He also brings huge experience and comes from a winning environment.
"He'll be a very effective addition to our squad next season."