Jaidyn Stephenson will wear number one for the Magpies next season.
Stephenson's move from no.35 to no.1 was confirmed on Thursday as the Pies announced a batch of new numbers.
The number was vacated by Alex Fasolo, who left the Pies to join the Blues as a free agent.
The returning Dayne Beams will wear 11, recently vacated by Jarryd Blair, with Callum Brown wearing his previous Collingwood number of 17.
Fellow recruit Jordan Roughead will wear 23, as he did in nine seasons at the Western Bulldogs.
Top pick Isaac Quaynor will wear the number 35, as is customary for Collingwood's first pick every year, while Will Kelly has received no.27 and Atu Bosenavulagi has received no.40.
Collingwood's Irish rookies Anton Tohill (no.43) and Mark Keane (no.47) have also received their numbers.