Viewers have seen Craig trying to get in shape by going running and even encouraging David Platt (Jack P Shepherd) to join him.
Fans know that off-screen, Colson has lost 10 stone leading to his slimmer figure and viewers got a first look at a toned Craig.
Taking to Twitter to comment on his appearance, one viewer shared: “Wowzers! Craig’s lost loads of weight! He’s literally half the man he was.
“Talk about a lockdown transformation! Well done sir! #Corrie #coronationstreet.”
Coronation Street airs Monday, Wednesday and Friday on ITV at 7.30pm.