Samoa international and Canterbury Bulldogs prop Sam Kasiano will join the Melbourne Storm on a three-year deal beginning in 2018.
Kasiano, 26, has been at the Bulldogs since making his NRL debut in 2011 but will head to Melbourne ahead of next season.
The four-time Samoa international, who previously played for New Zealand, has signed until at least the end of 2020.
"Sam is an experienced and skilful front rower who we believe can add a different dimension to our team," Storm football director Frank Ponissi said.
"We are very happy with how our pack has developed in recent seasons and signing a player of Sam's quality will only help us continue to improve as a football team.
"We were very impressed on Sam's enthusiasm and excitement to come to the Melbourne Storm and we are looking forward to welcoming Sam and his family to the club in November."
Melbourne have also re-signed Nelson Asofa-Solomona until at least the end of the 2019 season.
The Storm are top of the NRL ladder and face the Parramatta Eels on Saturday.