PREMIERSHIP defender Harrison Petty has put pen to paper on a new contract, which will see him remain a Demon until at least the end of 2025.

The 21-year-old, who has established himself as a key pillar of Melbourne’s backline, played 19 matches throughout the season and cemented his spot alongside fellow key defenders, Steven May and Jake Lever.

Melbourne list manager Tim Lamb said this was an important signing for the club, with Petty playing a crucial role in our backline this season.

“We all saw the rate of his development this year and we are really excited to see how far he can take his game,” Lamb told Melbourne Media.

“Harrison is a crucial piece of our future and we anticipate him being a key member of our defensive unit for many years to come.

“He is a terrific teammate who is highly respected by everyone and we look forward to watching him continue to develop over the coming seasons.

“To have Harrison commit to the club is brilliant, his performances particularly throughout the finals series were exceptional."

Petty was selected with pick No.37 in the 2017 National Draft.