Selwyn Cobbo's first Dolphins season has produced 18 tries from 19 appearances, helping earn the winger a long-term future at the club.
The 24-year-old has agreed to a four-year contract extension, remaining with the Dolphins through the end of the 2031 NRL season.
He was already contracted for 2027, meaning the new deal secures at least five seasons in Dolphins colours.
Cobbo has become a major attacking threat through his power, pace and finishing, while his form also helped restore him to Queensland's State of Origin team in 2026.
Dolphins Chief Executive Terry Reader said the club was delighted to retain him.
"Selwyn has made an immediate impact since joining the Dolphins and what he has been able to produce in his first season at the club has been remarkable," Reader said.
"It is clear the environment has really suited him and he is enjoying his football - and Selwyn'sperformances are underlining that.
"At just 24 years of age we know there is still plenty of great football ahead of him, and we're excited that will be in a Dolphins jersey.
"He has quickly become an important part of the team and to have a player of Selwyn's calibre committed to the club through until the end of 2031 is a great result."
Cobbo has scored 67 tries in 102 NRL matches across his career.