The blockbuster action star shared a series of images of the impromptu meet-and-greet along with a joke that they discussed "string theory and quantum entanglement."

Joe Biden accidentally crashed the set of Reacher on his way to breakfast Monday in Philadelphia, inadvertently strolling onto the premises as crew members filmed a police chase scene for the fourth season of the Prime Video thriller.

Former President Joe Biden and his son Hunter paid a surprise visit Monday morning to the "Reacher" Season 4 set in Philadelphia.