If loads of top footie matches and the rugby league Challenge Cup final aren't enough action for you this weekend, it's also the start of one of the biggest athletics events of the year.
The World Athletics Championships take place in Osaka, Japan, and there are some serious stars in the Team GB line up.
Here's Sportsround's three to watch
First up - Marlon Devonish
Keep an eye on Marlon Devonish. The sprinter is in great form this year and he'll have his sights set on a medal in the men's 100 metres.
But he'll have to work hard if he's to beat rising British star Craig Pickering, never mind the world record holder Asafa Powell and American sensation Tyson Gay.
Devonish is one of Britain's best athletes and won gold in the 4x100m Relay in the Athens Olympics in 2004.
Up next - Mo Farah
Watch out for Mo Farah. The 5,000m runner will be up against some really tough competition from African runners.
Even so, Mo is in with a really good chance of being the first European to get a medal in this event in years.
He's the second-fastest Briton of all time over 5,000m - and get this - Mo's left leg is more than an inch longer than his right leg. It's a problem that's caused him some injuries in the past!
And finally - Jessica Ennis
The big star that everyone will be watching is Jessica Ennis. She's one of Britain's best chances of a medal at the championships.
She'll have to prove herself in all seven events of the heptathlon, but with loads of personal bests this summer she should have a great chance of bagging Team GB a place on the podium.
The heptathlon is one seriously tough event. Athletes face the 100m hurdles, the high jump, long jump, shot put, javelin, and to top it off, there's a 200m and 800m race thrown in as well.
The World Athletics championships are held every other year, and this time all the action takes place in the Japanese city of Osaka. Around 2,000 athletes will take part, and you can see the best of the action on BBC One and Two and hear it on Five Live and Five Live Sports Extra.