The 38-year-old star, who has a 20-month-old son Leonardo with hubby Javier Bardem, claims she changed as a person from the moment she gave birth.
“From the first second, you feel so much in love. It’s a revolutionary experience,” said Penelope.
“That’s the best way I can describe it. It transforms you completely, in a second.”
The ‘To Rome With Love’ actress is also adamant she won’t be signing any magazine deals to show Leonardo off to the public.
“I’m 100 percent against that. Children aren’t a handbag. I want my son and my kids – if I have more – to grow up in a way that is as anonymous as possible.”