The former Friends star, who is turning 45 next months told Parade she didn't fear getting old because she still feels youthful.
"I'm a bit of a late bloomer! But it doesn't matter to me because it just gets better, " she explained. "They do say youth is wasted on the young, but I feel just as youthful now -- if not more -- than I did when I was 25. I'm more in my body; I'm more in my mind. Life is full. Life is wonderful. We're very, very fortunate."
The We're The Millers star added that she has "nothing to worry about" regarding her upcoming birthday.
"Although I don't think I had a care in the world at 25, either. That all started in my thirties, my awkward phase," she said referring to the time she starred in the hit sitcom Friends and married Brad Pitt.
But Aniston not only celebrates the fact that life has gotten simpler as she's gotten older, but she's looking forward to the future.
"My life is so fantastic. I'm so happy. There are a lot of exciting things that I'm excited about doing," she said. "We're about to do a sequel to Horrible Bosses, which is such a fun character for me. And I think I'm going to try at some point next year to direct a full-length feature, which I'm extremely excited about. I'm just so happy and I'm grateful for my fans. I just hope I keep doing work that they love."