Who sang Rudolph the Reindeer originally in 1950?

"Rudolph the Red-Nosed Reindeer" was originally sung by Gene Autry in 1949, not 1950. The song was written by Johnny Marks and became popular after Autry recorded it, helping to establish it as a classic Christmas song. Autry's rendition was the first to gain widespread acclaim, leading to numerous covers by various artists over the years.