Roberts, whose 21-year-old cousin Emma is an celebrity, considers youthful artists no more get the opportunity to take "gradual steps" to create their art.
The celebrity, who was 22 when she created her name in 1990 movie Very Lady, said: "The company is so different. You can never be that new young lady that has that duration of “Where’d she come from?”
She included that there had been "a time when I was motivated, as all youthful stars are, you know. You have got to keep going, you have to get out there. It’s too bad that youthful stars arriving up now will never get that type of encounter."