Did bing Crosby do his own whistling in White Christmas?

Bing Crosby did indeed whistle in the popular 1942 movie "White Christmas". He was known for his versatile singing and musical abilities and was credited for doing his own whistling in the film. Crosby's whistling, along with his charming demeanor and mellifluous voice, contributed to the success and lasting impact of "White Christmas", solidifying his status as a beloved entertainer and icon of the era.