Julia Roberts weighs in on cosmetic surgery debate

Julia Roberts, who turned 47 on Tuesday, is the most recent celebrity to comment on the pressure on actresses to look young at any cost.

"By Hollywood standards, I guess I've already taken a big risk in not having had a facelift," said Roberts in an interview promoting her role as a spokespersonfor Lancme cosmetics.

Her statement comes on the heels of Renee Zellweger's appearance last week, when her dramatically changed look set social media ablaze with speculation of cosmeticsurgery.

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Zellweger attributed her new look to a change in lifestyle and greater happiness in her personal life, but many commentators speculated more extreme measures were involved.

Roberts did not comment specifically on Zellweger, but did say that leading a balanced life has helped her feel at ease with the natural aging process.

"There is a lightness to my life nowan airy quality of not taking things too seriously. That's happiness," said Roberts, who lives in New Mexico with her cameraman husband, Danny Moder, and the couple's three children.

Roberts's career still busy

But whatever risks Roberts took in not going under the knife, it appears the decision has not hurt her career.

Last year, she acted opposite Meryl Streep in the Oscar-nominated August: Osage County.

In 2012, she parodied the obsession with staying young when she took on the role of the Evil Queen in the retelling of Snow White, Mirror Mirror.

Roberts says she hopes to be a role model for other women in their forties and fifties.

"I've told Lancme that I want to be an aging model, so they have to keep me for at least five more years until I'm over 50."

Roberts's next big film project is The Secret in Their Eyes,which co-stars Gwyneth Paltrow and Chiwetel Ejiofor.