January Kristen Jones is an American actress and model. She played 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 also portrayed Melissa Chartres in The Last Man on Earth (2015–2018) and has 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). She dated actor Jason Sudeikis in 2010 and People reported in January 2011 that they had split. In September 2011, she gave birth to a son whose father's identity was not publicly disclosed. As of January 2024, she has amassed 1.1 million followers on her Instagram platform.