How soon is the entertainment schedule released for Royal Cruises?

I suppose things can change at any time, but generally cruise ship entertainment stays the same for a while so this is most likely what will be offered on your cruise: https://www.princess.com/news/backgrounders_and_fact_sheets/factsheet/Royal%20Princess-Features-Expanded-Entertainment-Options.html

Most of the big shows do not change very often but the smaller entertainers usually sign on for 3 or 4 month periods and rotate in and out. Some entertainers have been on the same ship for many years doing a 6 on 6 off type of schedule. For the big shows if you are asking because you want to book that opens up on final payment. No bookings can be made before that but once final payment day happens the bookings open and book up quickly

Thanks for the info

I thought the question was in reference to RCI.

Also, many entertainers, get on at one spot and off at another, so they aren't on for the entire cruise. Is there a way to find out who?

I am somewhat confused, I wasn't aware until now that we need to book the entertainment prior to the cruise. Are you saying that I should make final payment now and book entertainment in order to see a show? Last time I cruised (2001), there was no online access and I just went to the show..I don't remember reserving..or maybe I did on board? Just curious because I am ready to finalize payment, just didn't know if I had to in order to see a show..

Well ... you do not have to book early but it helps. There is limited seating for each performance and on these newer larger ships there are 4000 to 6000 passengers now where as in 2001 a lot of ships were in the 2400 range for passengers. There is always the ability to walk up and wait until 5 minutes before the performance to see if there are no shows and open seats in which case you can be seated but there are no guarantees. If you book in advance on line then you have a seat. You do not have to pay early as in general booking is not opened until the final payment day and then the free for all begins.

Thank you so much. We are going on Liberty of the Seas in Jan 2020 and need wheelchair seating, so maybe I should. So, now the question is..do I start looking to see if I can book at 120 days or is it 90 days prior?

Does not hurt to start looking early. You can always reach out to RCL and ask them. Sometimes things change and there may also be special considerations for wheel chair access.

Last time I was on Liberty of the Seas (January 2019), they didn't accept reservations for the shows. It wasn't a problem. The theatre always seemed to have enough seats.