This does not happen often. An open call audition. That means anyone can try out for Cirque du Soleil. (Normally you must have a personal invitation from Casting.)
September 21 and 22 in Las Vegas.

I was there as an observer last Fall. My advice is that you do not go unless you have super physical ability, especially strength. Very good form and “line”. Athletes with multiple talents are more interesting for Cirque. (For example, a gymnast who is also a great surfer. A great bar worker also trained in dance. Etc.)
Since attending audition is at your own expense, best practice is to submit a demo video to Cirque du Soleil online. It should include, for example, for Men’s Artistic Gymnastics:
• A presentation to the camera (including a face and full-body shot): tell us about yourself and your specialty, your background and experience – 1 minute;
• Flexibility (the three splits, bridge, shoulders, pike position) – 1 minute;
• Strength (no leg rope climb, chin-ups, piked leg lifts) – 2 minutes;
• Basic floor acrobatics (handstand, walkovers, handsprings, standing flips, etc.) – 1 minute;
• Your skills on the high bars (releases, dismounts) and parallel bars – 1 minute, 30 seconds;
• Your most difficult trampoline dismounts as well as linked skills – 1 minute 30 seconds;
• Your most difficult tumbling passes – 1 minute
• Recent competition footage (High bars, floor and parallel bars – mention date).– 2 minutes;
• A dance improvisation. Show us how you move, let yourself go. Any style of dance, use the space and use your imagination! – 30 seconds;
• A demonstration of your skills in another discipline, if applicable – 30 seconds.
Details on the very cool Cirque casting site.
