"I don't really think about it at all. I'm in a pretty great place right now in my life and it has nothing to do with decades or numbers. My great-aunt just had her 90th birthday. Now that's a milestone. When I was a kid, 40 was ancient. I don't think of it that way at all any more. Even friends in their late fifties feel like contemporaries. I'm glad of that." RENEE ZELLWEGER isn't concerned about her upcoming 41st birthday in April (25Apr10).