January Jones is an American actress and model, best known for her role as Betty Draper on the critically acclaimed television series Mad Men. Born on January 5, 1978, in Sioux Falls, South Dakota, she began her career in modeling before transitioning to acting in the early 2000s. In addition to her work on Mad Men, January has appeared in various films, including American Wedding and X-Men: First Class. She has received several award nominations for her performances, showcasing her talent and versatility in both television and film.