Rugged up and ready to broadcastpublished at 09:20 Greenwich Mean Time 15 December 2015
Remember you can watch all the key moments today right here on this page, using the "Live Coverage" tab above.
There will be two special Stargazing Live programmes, presented by Dara O Briain and Prof Brian Cox:
- 10:30 GMT - Blast Off Live
- 19:00 GMT - Brit in Space, covering Tim's entry onto the International Space Station
There will also be live video of the Soyuz craft docking at the ISS at about 17:00 GMT.
Meanwhile, BBC News are also ready to cover the moment of lift-off in Kazakhstan. Our Moscow correspondent Sarah Rainsford tweeted:
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