“Josh will be starting against Doncaster,” said Crompton. “Wigan rate him very highly and they consider him to be one of the best junior players they’ve got.
“That’s a massive compliment and tells you what they you think of him. He brings size, aggression and is very quick. He’s a gem of a signing for a club like us.”
Doncaster are boosted by three new signings ahead of Friday’s Co-operative Championship One clash.
Rob Lunt also joins the Dons, and all three are in contention for a place in Friday’s squad.
However, Grant Edwards has been sidelined for nine months with a knee injury in news that will come as a major blow to Miller.
Doncaster chief executive Carl Hall said: “We will go to Blackpool refreshed after our short break and we will be looking to fire into them.”