The Olympics are finally here. Seven years of build-up followed by two and a half weeks of closely-fought competition between the planet's best athletes. But are you a true follower of the Games, or just a Johnny-come-lately?
Do you know your Bolt from your Bernard? Your Daley from your Dyatchin?
And just how much do you know about Eddie The Eagle and Eric The Eel?
Give our Olympic Quiz a try and see if you're going for gold, or struggling to qualify.
(Image: Rex Features)