(CNN) - British astronaut Tim Peake becomes the UK's first astronaut in space in more than 20 years, after he launched from Baikonur, Kazakhstan. American Tim Kopra and Russian Yuri Malenchenko are also making the six-hour trip to the International Space Station.
Peake, a European Space Agency astronaut, will spend six months orbiting the Earth with the crew of the ISS.
He will be the first British astronaut to join the ISS crew -- and the first "official" British astronaut in space. There have been other UK-born astronauts, but they either held U.S. citizenship or were privately funded.
Launch was at 5:03 a.m. Tuesday. The Soyuz rocket is set to dock at the ISS at 10:45 a.m. central.
Expedition 46 Commander Scott Kelly of NASA, along with crewmates Mikhail Kornienko and Sergey Volkov of Roscosmos remain on the station. They are on the first joint U.S.-Russian one-year mission.
Kelley watch the launch from inside the ISS. He tweeted this picture of his view of the launch.
The crew is due to land back to Earth on June 6, 2016.