Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The original soundtrack to the 1951 film Royal Wedding was released by MGM Records in the same year in three formats: as a set of four 10-inch 78-rpm shellac records, a set of fouir 45-rpm EPs, and as a 10-inch 33-rpm LP record.