The first training session got underway in Sisikon on Friday afternoon, as the world's best male and female divers leaped from from the magnificent Uri Stone into the clear blue waters of Lake Lucerne.
Enjoy all the best photos in the gallery above.
Watch it Live
This event will be LIVE on August 5 at 3:30 PM CEST (1:30 PM GMT) on www.redbullcliffdiving.com, Red Bull TV, Facebook, Youtube & Twitch. Red Bull TV is available on connected TVs, gaming consoles, mobile devices and more. Find out more at about.redbull.tv
If you miss the event or simply want to watch all the action again, the replay will be available on demand a few minutes after the event.