Assassins  is an American action thriller and major motion picture directed by Richard Donner . The film pits veteran action man Sylvester Stallone against glamorous new co-stars Antonio Banderas and Julianne Moore.

Robert Rath (Sylvester Stallone) is a highly paid assassin who’s yearning to retire, haunted by the memory of murdering his own mentor Nicolai years ago. He is on his last assignment when someone else gets to the 'mark' before he does. That intruder turns out to be Miguel Bain (Antonio Banderas), a fellow assassin and competitive sociopath. Bain maneuvers to kill Rath, aiming to succeed his rival as the number one assassin. …. This 2015 Warner Bros film launched the careers of Antonio Banderas and Julianne Moore.

Monica enjoyed a walk-on part during the movie’s dramatic climax when the two rival assassins arranged to meet in a Mexican bank, each scheming to kill the other.