The reality series, which follows celebrity patients as they go through detoxification and treatment at the Pasadena Recovery Center, will also include Rachel Uchitel, who was romantically linked to Tiger Woods, singer Leif Garrett, Keyshia Cole's mother and Frankie and Neffe star Frankie Lons, and socialite Jason "Gummi Bear" Davis.
The show, consisting of eight one-hour episodes, will premiere late 2010.
Hills star Wahler was arrested on a DUI charge in March, while Party of Five alum London told authorities last month that he was kidnapped and forced to use illicit drugs. Dickinson, a former supermodel and America's Next Top Model judge, most recently appeared in the NBC reality series I'm a Celebrity ... Get Me Out of Here.
What do you think of the new cast?