Tiger Woods and his wife have announced they are expecting their first child. In a message posted on his website yesterday, Woods said, "As some of you know, today is my 31st birthday. I'll spend it quietly with family and friends, but Elin and I have more exciting news to share. We are expecting our first child together this summer. Obviously, we couldn't be happier and our families are thrilled. I have always wanted to be a dad. I just wish my father could be around to share the experience."