Who is the original singer of "baby, it's cold out side" made famous by Ray Charles and Betty Carter?

Question

the song is a duet. Who wrote it and who initially performed it.

Answer 1

It was composed by Frank Loesser with lyrics by Johnny Mercer and published in 1948.

By Dinah Shore and Buddy Clark on March 17, 1949 released by Columbia Records as catalog number 38463. (a day before the Whiting-Mercer release).
By Margaret Whiting and Johnny Mercer on March 18, 1949 released by Capitol Records as catalog number 567

Answer 2

Words & Music by Frank Loesser
Recorded by Margaret Whiting & Johnny Mercer, 1949
From the 1949 movie "Neptune's Daughter"

Answer 3

I remember Dean Martin sang it--actually the year I was born.
Words & Music by Frank Loesser.
Link shows that Johnny Mercer & Margaret Whiting initially preformed it.

Answer 4

I don't know, but it's a GREAT song. Heard it used in a movie recently, like from 2004 or 2005 or so, and would love to find out what movie that was. Any ideas?