Hello and welcome to planDisney, Leann!
Thank you for taking the time to send a question our way. We are thrilled to have you here, and we cannot wait for you to make memories with your family during your upcoming visit to the
Walt Disney World Resort!
I am also excited for you and happy to hear your sister would like to join you during your vacation. Please note, however, that it is usually only possible to add another Guest to a
Disney Resort hotel reservation for the whole duration of a stay (subject to the terms and conditions of the original booking).
If she is joining you for the first or last portion of your visit, you could consider modifying your reservation and making a second booking to add your sister to the reservation for the dates she will be there with you. Be sure to verify the terms and conditions of your original reservation because all modifications are subject to availability, and change fees may apply. I know this is not ideal, but you could even make a separate reservation for your sister or add her to your reservation and then she would be free to join you during the dates she will be there (subject to availability and new charges). I recommend reaching out to
Disney Resort Hotel Reservations, and they will be glad to verify options.
It was a pleasure answering your question, Leann. I hope this helps you while planning and that you have a magical visit to the Walt Disney World Resort!
Best Disney wishes,
Thiana