Washington, Aug 20 (ANI): Just two months after giving birth to a baby girl, Jessica Alba has become 25 lbs. lighter.

Now, her trainer has revealed just how the stunner managed to do so.

Jessica went from a size 8 to a size 4 pretty quickly, People quoted Alba's longtime trainer Ramona Braganza, as saying.

The actress - who flaunted her post-baby body at the ALMA Awards on Aug. 17 - has been opting for a low-fat, low-carb diet as part of Braganza's 321 Baby Bulge Be Gone plan.

She has been sweating, too, the trainer said.

The baby always comes first, but Jessica definitely set goals for herself, said Braganza, who now trains Alba six days a week.

And having a workout buddy helped.

She loves working out with a girlfriend, said Braganza, whose client, actress Jamie King, frequently trains with Alba.

Braganza added: Jessica has made amazing progress in a very short time. (ANI)