Melbourne defender Joel Smith will make his AFL debut against St Kilda on Saturday after being elevated to the senior list on Thursday.

The 21-year-old was promoted after ruckman Mitch King was placed on the long-term injury list.

โ€œItโ€™s a bit of a shock and I didnโ€™t expect it,โ€ Smith told Melbourne TV.

โ€œA year ago, I was playing in the VFL Development [League] and here I am now playing round one against St Kilda and Iโ€™m rapt.

โ€œAll of the hard work has paid off and I just canโ€™t wait to be out there.

โ€œAs pre-season went on, I was training really well and I thought I could actually do this.

โ€œI played a couple of JLT [Community Series] matches and the last few weeks Iโ€™ve been thinking about it and itโ€™s been in the back of my mind.

โ€œNow Iโ€™m playing, Iโ€™m ready to go and I canโ€™t wait.โ€