January Kristen Jones is an American actress. She is best known for playing Betty Draper in Mad Men (2007–2015), for which she was nominated for two Golden Globe Awards for Best Actress – Television Series Drama and a Primetime Emmy Award for Outstanding Lead Actress in a Drama Series.
She has portrayed Melissa Chartres in The Last Man on Earth (2015–2018) and starred in films such as American Wedding (2003), We Are Marshall (2006), The Boat That Rocked (2009), Unknown (2011), Seeking Justice (2011), and X-Men: First Class (2011).