Born: January 14th 2001
International: None (eligible to represent England)
A goalkeeper who was previously with Reading, Hillson joined Arsenal initially on loan in 2019 before later making the deal permanent.
Hillson featured just twice for the U23s last season, with both of those appearances coming early in the campaign, while he also played twice for the U18s.
With Karl Hein ahead of him, Hillson may well have to be patient for opportunities, but he will hope to receive chances at some stage.