GWS Giants free agent Zac Williams is now a Carlton player.

The paperwork was lodged for the restricted free agent on Friday afternoon, with the Giants opting not to match the Blues' offer.

GWS will receive a first-round pick as compensation - currently the No. 10 overall selection.

According to multiple reports, the five-year deal is worth up to $900,000 a season.

Williams has played 113 games for the Giants after making his debut in 2013.

The 26-year old averaged 16.9 disposals from 11 games in 2020.