The transfer window may have closed but William Hill SPFL clubs aren't finished yet with two Premiership sides adding free agents to their ranks.
Celtic confirmed the signing of striker Kelechi Iheanacho on a one-year deal with the league leaders holding an option for a further year.
Iheanacho, who departed La Liga side Sevilla on deadline day, previously worked with Celtic manager Brendan Rodgers during the pair's time together at Leicester City.
Meanwhile former Celtic midfielder Stuart Armstrong is back in Scotland seven years after departing Glasgow's East End.
The Scotland midfielder has agreed a two-year deal with Aberdeen to add to Jimmy Thelin's options in the centre of the field.
Armstrong, 33, made his senior debut with Dundee United before making the move to Celtic where he won four league titles, two Scottish Cups and two Scottish League Cups.
He spent six years with Southampton before short stints with Vancouver Whitecaps and Sheffield Wednesday.
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