was white christmas written for the movie

Yes, "White Christmas" was written specifically for the movie White Christmas. The song was written by Irving Berlin, who also wrote many other popular songs such as "God Bless America" and "Cheek to Cheek." It was one of the most popular songs from the movie, and it has become a classic holiday song. The song has been covered by many different artists over the years, and it remains a popular choice for Christmas music.