The What to Expect When You're Expecting star revealed that she is looking forward to her fortieth birthday in August.
"I love getting older," she told Access Hollywood. "I think it's such a blessing."
The actress went on to say that she becomes more comfortable with herself as she ages.
"As I get older, I become happier - because I'm wiser, I know myself better [and] I connect to people better," she explained. "I think that in our society we don't honour older generations enough because we think of it as being bad because the appearance changes."
Diaz recently confessed that she started crying after receiving a bad haircut from her friend.
Watch the trailer for What to Expect When You're Expecting below: