Natalie Portman does gyrotonics to keep fit.

The 32-year-old actress maintains her slim figure through a combination of jogging and gyrotonics - an exercise which blends elements of Pilates, Yoga, Tai-chi, and swimming - as well as running after her two-year-old son Aleph.

She said: ''I try to exercise. I jog and I do gyrotonics which is sort of like Pilates and is very good for the spine, very healing.

''Plus, I'm running around all the time, especially now I have a two-year-old son, which keeps me very busy and engaged with the world.''

The brunette beauty - who is married to choreographer Benjamin Millepied - finds ''juggling'' work and family responsibilities easier with the help of her husband.

She explained to Britain's HELLO! magazine: ''It's a constant juggling situation. I'm at the point where I love my family but I still have my work and it's a question of fitting it all in.

''I'm lucky enough to have great help and a great partner, which certainly makes things much easier.''