Nicole Kidman (45) and Julia Roberts (45) should now feel just 35 Some 17% of women in 40s say sex life is better than ever Almost 60% of women still confident enough to wear a bikini By Martha De Lacey PUBLISHED: 05:06 EST, 9 April 2013 | UPDATED: 07:28 EST, 9 April 2013 Life, they say, really kicks off at the age of 40. And it appears that for women this really is the case. The fairer sex is more content, satisfied and fulfilled when they hit their fifth decade than at any other age - and even feel some 10 years younger than they actually are - according to a new study. So stars such as Nicole Kidman (45), Julia Roberts (45), Catherine Zeta-Jones (43), Selma Blair (40) and Geri Halliwell (40) will be feeling more vibrant and youthful now than they were in their early and mid-thirties. Actresses Nicole Kidman, left, and Julia Roberts, right, are both 45 years old More than half of women over 40 (55 per cent) also say they are more confident in their appearance than when they were i