PSG has now secured the season-opening trophy on fourteen different times.
The Parisian giants needed a stoppage-time equaliser followed by a successful penalty shootout to get past Marseille in Kuwait and capture a fourth straight Trophee des Champions title.
The European champions seemed to be sailing towards a comfortable win in the showdown featuring the Ligue 1 champions and the French Cup holders after the French winger opened the scoring in the opening stages.
However, the southern French side fired two times late to seize a surprise advantage. First, Mason Greenwood scored from the spot-kick, before the defender unfortunately directed the ball into his own net for an own goal.
In a remarkable twist of events, Goncalo Ramos grabbed a vital equaliser in the dying moments to send the contest into a penalty shootout. PSG goalkeeper Lucas Chevalier then emerged as the hero, saving crucial attempts from O'Riley and Hamed Traore.
From the spot, Goncalo Ramos, Vitinha, the full-back, and the young talent all scored with composure for PSG to seal a 4-1 shootout victory.
The record winners PSG, who faced last season's Ligue 1 second-placed team Marseille after completing a league and cup double, have now lifted this competition for the 12th time in the last 13 years.
