Fabulously 40-Something

It all happens in the forties: Year by year, see the decade's It women, including Teri Hatcher, Sheryl Crow and more. By Caryn Midler

LENA OLIN, 50

It's far from over at 49: With hot roles on both TV (playing Sydney Bristow's double-agent mom in Alias) and in film (husband Lasse Hallstrom's upcoming Casanova, starring Heath Ledger), Swedish beauty Olin has time on her side, in her own way. " I'm not regimented," the mom of two told InStyle. "I don't diet, and I exercise the way I want to."