The world's top athletes are all strutting their stuff in Germany over the next nine days.
The first day so far belongs to Britain's Jess Ennis who's flying in the heptathlon. She's got the shot put and 200m left on Saturday and three to go on Sunday. Can she do it?
The sprinters have already been ripping up the track and return for the second round at 1750 BST. Is anybody going to stop the lightning Bolt? GB's Dwain Chambers thinks so.
Saturday's later session also sees Kate Dennison in pole vault qualifying, women's 10,000m final and Britain's David Greene going in the 400m hurdles.
Bring it on. Give us your thoughts and predictions.