It is not a fad diet or a special trainer that is the secret to Hollywood superstar Julia Roberts trim physique, instead she relies on some old fashioned jogging.

The 'Pretty Woman' star has been photographed taking morning runs near her Malibu mansion, reported Daily Mail online.

The 42-year-old actress who was recently in India to shoot for her film 'Eat Pray Love' worked up a sweat during her brisk jog, wearing a pair of black shorts and sports jacket.

The mother-of-three kept herself motivated by listening to music during her exercise burst.

The actress has recently returned from Indonesia where she was shooting 'Eat, Pray, Love'.

Producers of the film had run into trouble with locals in the country with some residents of the mountain town of Ubud claiming they had been paid less for the use of their land than others.

The film crew had to contend with dozens of angry villagers who blocked roads and demanded 15,000 pounds before filming could commence.

That problem was resolved, but Columbia Pictures, the producers had since beefed up security.

The film which also stars Javier Bardem, Richard Jenkins and James Franco is based on the best-selling memoirs of Elizabeth Gilbert.