Frank Pritchard will return to the NRL in 2017 after signing a deal to play with Parramatta next season.
The 33-year-old former Canterbury star joined Hull in the English Super League this season and was in the team that made history by winning the Challenge Cup at Wembley in August.
However, he has decided to take his family back to Australia after receiving an offer from the Eels.
"The club would like to thank Frank for his significant contribution to the club in 2016 and his invaluable role he played in Hull winning at Wembley in the Challenge Cup final for the first time," Hull said in a statement.
"We wish Frank and his family a successful return to Australia and upon resuming his career in the NRL."
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Parramatta coach Brad Arthur said: "Frank has played at the highest level and I am sure our members and fans are pleased that we have secured Pritchard as we lead into 2017.
"Frank is a good example of a strong addition not only on the field, but as a wealth of knowledge to our developing players."
Pritchard will be a replacement for Parramatta's retired prop Danny Wicks.
