Gerard Depardieu unloaded on an Air France jet Tuesday ... as in he pissed in the aisle.
Depardieu was on the ground in Paris, waiting for his plane to take off for Dublin, but a delay on the ground proved too much for the actor.
Depardieu told the flight attendant, "Je veux pisser," -- I have to pee -- but she was unmoved ... telling the famous Frenchie he would have to wait 15 minutes because the flight was about to take off.
According to witnesses, Depardieu unzipped his pants and pissed on the aisle carpet.
The jet returned to the gate and it took nearly 2 hours for the ground crew to clean up the mess.
Depardieu was escorted off the plane and it's unclear if authorities will take action against him. Witnesses say the actor was intoxicated.
The actor's reps could not be reached for comment.