Jacob Palmer is a fictional character from the 2011 romantic comedy film, "Crazy, Stupid, Love." He is portrayed by actor Ryan Gosling and is known for his charming personality and suave demeanor. Jacob is a successful bachelor who helps his friend, Cal Weaver, navigate the dating world after Cal's marriage falls apart. In the film, Jacob's character undergoes significant development as he learns about love and relationships. His interactions with Hannah, played by Emma Stone, challenge his views on romance and commitment, ultimately leading him to reconsider his lifestyle and priorities.