Courtesy of InStyle

Looking at Julianne Moore's flawless face and figure, it's hard to believe the actress turned 50 back in December. Still, Moore admits to the March issue of InStyle magazine that some things take on new urgency when you enter your sixth decade.

"One thing a 50th birthday does is say, All right, time is marching. You have these things you're happy with and proud of. But if there's something you haven't done that you've been waiting to do, then by all means, don't want any longer. Do it!" Moore tells friend and fashion designer Tom Ford in the mag.

Even though the "The Kids Are All Right" actress often comes across as terribly sexy on the screen, in real life she rarely feels like a siren, which is why she cherishes alone time with her hubby, the director and screenwriter Bart Freundlich.

"Doing the mommy stuff does sort of squash that area of your life. I can feel that way when I'm alone with Bart or when we take a trip," Moore says. "But the day-to-day of picking up kids and going to the eye doctor and then dropping them off at basketball and then going to the middle school concert, that stuff doesn't make you feel very sexy! That was my day yesterday."

Her mundane reality is something every woman can relate to.

"I have a terrible habit of staying in my yoga clothes all day," Moore admits.

Amen to that, sister!

Moore is wearing Tom Ford on the cover, and appears inside wearing Marc Jacobs, Dior, Lanvin, Dolce & Gabbana and Louis Vuitton.

To read Ford's full interview with the actress and to see their gorgeous photo spread, head over to InStyle.com.