We all know Cinderella's dress is blue, but when you are 2 years old, everything has to be pink!
Simplicity 2563, which is an official Disney Princess costume pattern. Simplicity also publishes this pattern in the girls and misses size ranges, for all of your princess needs. As far as costume patterns go, this one is pretty good. The bodice is faux lined (that is, you sew the shoulder seams of bodice and lining separately, attach them at the neckline and then treat them as one). I'm not a fan of that, since part of the point of lining to me is to have a clean finish on the inside, so I lined it the traditional way. It does run a bit large. Myra is currently between a size 1 and 2, so I made the 2. I had to pin it up in back to keep in on her shoulders. Part of that is that the neckline is quite low, but then so was Cinderella's. It is also drafted with a VERY long skirt. The photos on the pattern envelope would have you believe that this is a knee length dress. In fact, in order to get the length you see, which drags the floor on Myra, I had to remove 5 inches and do a 2 inch deep hem.
This dress was actually pretty fun to sew, or at least it would have been if I had not been using wretched polyester. I have nothing good to say about this fabric. Ick.