Both players have been praised by Brendan Rodgers in the past with the Daily Mail claiming the talented duo are on the Hoops boss’ January wishlist.
The pair were spotted at Parkhead on Tuesday night watching Celtic’s final GRoup B encounter against Anderlecht, which the Belgian champions won 1-0.
Morgan has been a key figure in Jack Ross’ promotion chasing Buddies side as they try to get back into the top flight from the Championship.
He started his youth career with Rangers before joining St Mirren.
Dundee stopper Hendry has earned rave reviews for his performances this season, attracting interest from top-flight English trio Crystal Palace, Newcastle and Huddersfield.
The 22-year-old started his career with Partick Thistle before being snapped up by Wigan Athletic.