Montana Moore is a fictional character from the romantic comedy film "Something Borrowed," which is based on the novel by Emily Giffin. In the story, she is portrayed as a successful attorney who struggles with her feelings for her best friend's fiancé, Dex. Montana is characterized by her intelligence and ambition, but she also faces personal dilemmas that challenge her relationships. The film explores themes of love, friendship, and the complexities of romantic choices, highlighting Montana's journey as she navigates these emotional conflicts.