United Kingdom, June 1 -- Paris Hilton has always been a "down-to-earth girl".

The 44-year-old star has credited her parents for instilling a "strong work ethic" into her, and Paris believes she's been unaffected by her own fame and success.

Paris - who starred on the reality series 'The Simple Life' between 2003 and 2007 - told HELLO! magazine: "I feel as though I've been the same my whole life. My parents instilled a strong work ethic in me from when I was very young and that has always kept me grounded.

"I remember when the very first 'Simple Life' episode aired, my mom took me aside and told me that my life was about to change forever but that I should never stop being the same down-to-earth girl I am. I've never forgotten that." ...