The Rock's got a soft spot ... check out video of Dwayne Johnson at a recent movie premiere -- he stopped to take a selfie with a crying fan, and the interaction was super sweet!!
The adorable moment all unfolded at a "Red One" event last week in Germany ... when DJ noticed a young woman near the red carpet holding a sign that was asking the Christmas movie's stars for a hug.
In video from the scene that Johnson shared on his X page on Thursday, you can see the woman was sobbing .