Scott Joseph Kelly (born February 21, 1964) is an American astronaut and a retired U.S. Navy Captain. A veteran of three previous missions, Kelly was selected in November 2012 for a special yearlong mission to the International Space Station set to begin in the spring of 2015. Kelly was commander of the International Space Station (ISS) Expedition 26. Kelly's identical twin brother, Mark Kelly, is also an astronaut. The Kelly brothers are the only siblings to have both traveled in space. He currently serves as the International Space Station operations branch chief.