Hi Maricela,
There are 2 dining locations where you are able to meet the Disney Princesses:-
Akershus Royal Banquet Hall in the Norway Pavillion at Epcot
Cinderella's Royal Table inside Cinderella's Castle at Magic Kingdom
You are able to make advanced dining reservations for both locations on-line by clicking on the above links and then selecting 'Make a Reservation'
Please note that advanced payment is required when making a reservation at Cinderella's Royal Table due to its popularity and that as part of the dining experience, guests here receive one professional imaging package for groups of up to 4 paying guests, 2 packages for groups of 5
to 8 guests, and 3 packages for groups of 9 to 12 guests which includes one 6" x 8" and four 4" x 6" prints, and one 6" x 8"
print of Cinderella Castle, all in a Cinderella-themed photo holder.
Character meals with the Disney Princesses are extremely popular so I would highly recommend that you make an advanced dining reservation at the restaurant of your choice as soon as you are able to do so (up to 180 days prior to your visit)
Wishing you lovely breakfast and magical trip!