Josh Kelly celebrates a goal against Essendon in round eight, 2021. Picture: AFL Photos

JOSH Kelly will play out his career at Greater Western Sydney, having triggered the lucrative eight-year extension within his contract on Tuesday.

The star midfielder informed interested rival clubs earlier in the afternoon that he would remain with the Giants for the remainder of his playing days, opting into a deal that will see him stay with the club until at least the end of the 2029 season.

The deal, which will see Kelly commit his playing future at GWS until the age of 34, follows other long-term commitments at the Giants from captain Stephen Coniglio (contracted until 2026), Lachie Whitfield (2027) and Toby Greene (2026).

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"Josh is a young leader of our club, he wants to play consistent finals football and clearly believes the club will be contending for several years to come," Giants football boss Jason McCartney said.

"We are delighted Josh now joins the likes of Stephen Coniglio, Toby Greene, Lachie Whitfield and Nick Haynes as players that’ll spend their whole careers at the club."

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Kelly, a Kevin Sheedy Medal winner as the club's best and fairest and an All-Australian in a career-best campaign in 2017, has re-emerged as one of the side's most important players this season averaging 25.6 disposals and 5.3 tackles per game while kicking 15 goals.

The Giants now face tough decisions on other key members of its squad without a contract for next season, including star onballer Jacob Hopper and developing key forward Jake Riccardi.