First of all, stars will have strong determination and perseverance, because this is the need of work. Being an actor is also a job. They often need to take pictures. They met all kinds of long guns and short guns. Needless to say, the face value is very high, and the figure needs to be perfect to shoot. So stars must be thin and lose weight, which is the need of their work. Only by losing weight can they look good and meet the requirements of the audience. That's what actors do They need perfect bodies and high-value faces. So under this sense of responsibility, in order not to lose their jobs, they will try to lose weight until they reach the standard. You know, the stars in the lens are already so thin, but in fact, the lens will gain weight and be thinner in reality.
The second is a star, with a professional weight loss team. Losing weight by yourself is not as good as everyone helping to lose weight. Stars lose weight and are healthier. With a professional weight loss team, the team will arrange what the stars need to eat and do what exercise, which is more efficient than aimless weight loss.
The above is my own opinion. If you have other ideas, please come and discuss with me.