Actor is cheating on his co-star with a woman he met on the set of a movie he filmed well over a year ago

This B+ list mostly television actor from a hit NBC show is cheating on his co-star with a woman he met on the set of a movie he filmed well over a year ago.

Sullivan Stapleton
Co-star: Jaimie Alexander
Other woman: Alice Braga (Kill Me Three Times)

Source: http://www.crazydaysandnights.net