Wilshere, who is not expected to return from an ankle injury until the New Year, is at the Emirates Stadium to watch his teammates take on Steve Bruce's side.
"At the Emirates with my boy! Getting the Gooner blood running through him already! Want to hear you today #AFC fans," the midfielder wrote on his Twitter account.
The Gunners and Sunderland are currently 15th and 16th in the Premier League table respectively.