Nope, you won't. You will only see Cinderella downstairs. Then upstairs at certain points of the night the Fairy Godmother and the 2 girl mice will come out and do a celebration ceremony and they usually do not stop for photos/autographs.
Only breakfast and lunch have princesses circulating.
The mice did stop and pose for photos and autographs with us. MNSSHP was going on so I am not sure if that made a diifference. If you want lots of princessses go for Norway if you want time with Cinderella do the 1900 park fare dinner.