Katie HolmesKatie Holmes reportedly recently spent three days at a Scientology “boot camp” after considering taking a Broadway role.

Katie was said to be in talks with producers to star in a revival of Arthur Miller’s All My Sons later this year but according to Star magazine, husband Tom Cruise was concerned about her moving to New York without him for the duration of the show’s run.

The magazine quotes a Scientology insider describing Katie’s three day stay at Gold Base, the Scientology compound in Hemet, California: “It included various tests, confession sessions, tons of reading and physically challenging purification processes.”

The source added that the “personal spiritual counselling” sessions last up to 36 hours straight, with few breaks and little food provided: “Tom insists that auditing and purification practices are incredibly beneficial to Scientologists at all levels.”