Super Eagles forward Kelechi Iheanacho started his spell at Celtic on a brilliant note.
Iheanacho joined the Scottish champions on a free transfer from Sevilla and made an instant impact for the champions.
The reunion between Brendan Rodgers and Iheanacho has started to yield positive result as the Nigerian international scored on his debut.
Iheanacho came on as second half substitute and was given the responsibility of converting a penalty in added time.
The Super Eagles forward stepped up and buried the ball into the top left-corner to give the vistsors a 2-1 win over Kilmarnock.
Celtic return to the summit of the league table with 13 points from five matches.
Kelechi Iheanacho will hope to get his start for the club in the quarter-finals of the League away at Patrick Thistle.
