Celtic loanee Allan is back at Parkhead six months ahead of schedule.
Scott Allan has returned to Celtic early from a loan spell at Rotherham United, the Daily Record reports.
Allan moved to the New York Stadium until the end of the season in August, but made just nine appearances for the English Championship side.

The 25-year-old had not been involved in any of the Millers’ matchday squads since the departure of former Celtic defender Alan Stubbs in October.
Stubbs had previously managed Allan at Hibernian and brought him to Rotherham shortly after his appointment.
According to the Daily Record, Allan spent Monday morning running with Bhoys left-back Kieran Tierney, who is stepping up his recovery following ankle ligament surgery.

Tierney, however, is not expected to return to action until after the Scottish Premiership’s mid-season break.
Allan moved to Parkhead amid interest from both Rotherham and Rangers in 2015 but has made just 17 appearances to date.
The midfielder is yet to feature for Celtic this season, meaning he could still sign for another club in the January transfer window, provided that remains the case.
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