Julia Roberts dedicates herself to her ''family and friends''.

The 'Pretty Woman' star - who has nine-year-old twins Hazel and Finn and six-year-old son Henry with husband Daniel Moder - says the focus of ''happiness'' changes with age.

Speaking to the Daily Express newspaper, she said: ''Happiness takes on different forms as you get older and smarter, make more friends and get deeper into relationships.

''I am in a fortunate pace in which I can dedicate myself to my family and friends.''

The 46-year-old actress doesn't feel like she has to struggle to live a ''normal life'' because she never tried to get help for any aspect of her personal life.

She added: ''I do not have to go to great lengths to participate in a normal life.

''I was once asked if I would like to be an ordinary housewife. But I am ordinary.

''The only person who cleaned my house was me. I never tried to put other parts of my life into compartments.''

Julia also insisted she isn't motivated by ''success'', preferring to focus on her children.

She explained: ''I love being at home and love being a mum. I am not driven only by acting or film success. There are so many other things to do and enjoy.''