PENELOPE Cruz always expects to be fired when starring in a film. The 35-year-old actress - who won this years Best Supporting Actress Oscar for her role as Maria Elena in Vicky Cristina Barcelona - admits she lacks confidence in her abilities as an actress. She told Britains Psychologies magazine: Every time I make a film, I feel like its my first time. I always think they could fire me. Ive ruined my own happiness and created problems with my friends because of this tendency. It takes discipline for me to stop worrying. Penelope - who is dating actor Javier Bardem - added she plans to put her career on hold to have children at some point, but feels unable to commit fully to being a mother at the moment. She explained: I have a tendency to become a mother to everyone around me. My brother and sister are always complaining that Im too protective. I want to have babies one day but not right now. When I do it I want to do it really well. I want it to be my best project in life. I dont know if I believe in marriage. I believe in family, love and children. - ES