Lindsay Lohan's weight gain trainer

Lindsay Lohan has hired a personal trainer - to put on weight.

Speculation has been mounting in recent months that the sexy actress could be suffering from an eating disorder after she was repeatedly photographed looking stick-thin

But although Lohan, 19, has always refuted the claims, she has employed a specialist trainer to help her bulk up

Exercise coach Justin Gelband has put the 'Herbie: Fully Loaded' star on a special diet to restore her sexy curves and the star has purportedly gone up two dress sizes

She said: "I'm working out with a trainer and eating healthily I want my boobs back"

Justin also claims the teen star, famed for her love of partying, is planning to ditch her unhealthy habits for good

He said: "Lindsay is very athletic

"In the future she plans to commit herself to a healthier lifestyle"