To get on "The Biggest Loser" as of June 2015, visit TheBiggestLoserCasting.com and click on Pre-Register. Fill out the application, then send a video submission to the casting team through email or mail.
The casting team also has open calls for cast members, which appear on the Open Calls page of TheBiggestLoser.com. You can attend an open call instead of sending a video submission. Print the pre-registration form and bring it to the open call with you. If you're unable to bring the form, the casting team provides the form at the open call. However, completing the form beforehand allows you to finish the open call more quickly.
The casting team asks applicants to bring a current photo to the open call. If you have a picture that relates to your background story, such as one that shows you as an athlete or an overweight child, bring that as well.
If the casting team selects you for a callback, they generally notify you within two days. The callback is an on-camera interview with the show's casting directors.
Applicants can also send in video submissions. Video submissions should be between five and 10 minutes long and effectively showcase the applicant's personality.