For the first time in history the IAAF and IPC World Athletics Championships will be hosted by the same city, London.
Following on from the magic of London 2012, the world's very best able-bodied and disability athletes will be back in action in The Stadium on Queen Elizabeth's Olympic Park, where the British public will be longing for more magical performances.
First up is the World Para Athletics Championships, which take place from Friday 14 to Sunday 23, and will see the likes of Jonnie Peacock and Richard Whitehead return to the scene of their greatest triumphs. Roared on by an adoring home crowd, they'll look to add a World title on home soil to their already bulging trophy cabinets.
Next come the IAAF World Championships, which take place from Friday 4 to Sunday 13 August and will see the great Usain Bolt in action for the final time. Mo Farah will also go for double gold in the 5,000m and 10,000m before he calls time on his track career and switches his focus to the marathon.