Her directors, not satisfied with having Bollywood's leading lady in their films, have made her lose weight, gain weight and lose it again for successive films.
Most recently Rai was asked to shed a few pounds for her role in the film Dhoom 2, which is being shot in Namibia.
So, Rai's personal trainer Deepika is busy leading Ash through a two-hour workout starting at 0400 hours IST every morning, a national daily said.
"Deepika is with Ash in Namibia," Rai's manager, Hari Singh told the newspaper.
"Ash is a very dedicated actress and she is working to get into the skin of her role," Singh added.
Rai had put on some extra pounds for her role in the film Guru, which she was filming before heading to Namibia for Dhoom 2.