Demi Moore is not afraid of getting old.

The 'Ghost' star - who, at 45, is 15 years older than husband Ashton Kutcher says it's important not to worry too much about looks as it's how you feel on the inside that matters.

Demi -- who was once rumored to have spent over $440,000 on cosmetic surgery -- is quoted as saying: "It''s important not to get yourself obsessed about that because it''s a game you're going to lose. If you think you're old and feel you're done growing, then you are going to have a stale life around you."

Demi also insists she has become more relaxed as the years have advanced.

She added: "I place an importance on remembering not to take myself too seriously because I certainly have in the past." Last year, the mother-of-three hit out at the ageism in Hollywood.

She said: "There aren't that many good roles for women over 40. A lot of them don't have much substance, other than being someone's mother or wife. If we are told we are not valuable once we hit 30, it is a problem."

"We can't just wait for something to happen. We have to say, 'I'm mad as hell and I'm not going to take it any more.'"

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