ID for 21 year old

[CaptainAmerica]

OK, so we just had this same situation with my daughter a few weeks ago. Her license expired on her birthday, we flew out 2 days later and her new one had not come in yet. Our State has the paper to show as a temporary license along with the expired license. Not one person, including TSA asked for that paper. In fact, only 1 person even noticed that it was expired and that was the TSA agent at MCO on the way back and all she said was "did you know that your license is expired?" My daughter said yes and the the new one was coming in the mail, and that was it. I don't think that anyone at Disney even looks at expiration dates, just your Date of birth to make sure that you are old enough. I would renew it before and maybe it will come in time, if not, at least you will have that paper to show that the license is renewed, just not mailed out yet. You can renew 10 days ahead of your 21st birthday here.

An expired license is valid ID for at least 30 days in pretty much every state except, I think, California. The TSA will accept it for a year.