Imminent Celtic signing scored again to help his side to a win.
It was a performance which demonstrated why Scottish champions Celtic are determined to land his signature, as has been strongly rumoured.
Morgan, a former Rangers youth prospect, has made a name for himself for St Mirren and his display last night was another feather in his cap.
He scored two superb individual goals to take his tally for the season to 12, with this the best campaign of his career to date.
Morgan's display showed what a big loss he will be to St Mirren next campaign, after helping them extend their lead at the top of the table to a five point gap.
The 21-year-old is full of confidence and has a real chance of reaching 20 goals by the end of the season.
Here is a look at how Celtic fans reacted on Twitter to Morgan's performance...
Will be happy is Lewis Morgan signs for Celtic- looks a great wee pler— Cal Rae (@CalRae67) December 29, 2017
Lewis morgan will be the kick up the arse sinclair needs— James (@GlasgowFireball) December 29, 2017
It's been a good evening to catch a glimpse of this Lewis Morgan fella for St.Mirren #NotBad— TheMancCelt82 (@PeterKane82) December 29, 2017
Watching the st mirren dundee united game and looks like Celtic have got an absolute player in that Lewis Morgan— lewis viola (@lewisviola) December 29, 2017
Lewis Morgan scoring a double tonight. Two great goals— CelticLisboa (@CelticLisboa) December 29, 2017
LEWIS MORGAN!!! 2nd GOAL, WHAT A GOAL!! LOOKS A STEAL AT £300,000!!!— Shauny (@ShaunyCeltic) December 29, 2017
BRILLIANT FROM THE KID!!
How funny would it be to get Lewis Morgan on at half time tomorrow to announce his signing? Scenes of Sevco rage.— Arthur T ⭐️ (@OllytheG) December 29, 2017
What a strike by Lewis Morgan— Insta_celts (@insta_celts) December 29, 2017