Some interesting big studio casting there, too. Guy Kibbe (supporting actor in a zillion films in the 1930s) is St. Peter, and that has to be the legendary Mel Blanc (Bugs Bunny) as the voice of the oil temp. Liberator pilot Bob had some fame as detective Peter Gunn on TV years later (if you're not old enough to have seen the show, you might recognize its distinctive theme song).
"Joe Instructor" played Kris Kringle's doctor at the old folks home in the Christmas classic Miracle on 34th Street.
(Okay, I watch too many old movies when I'm not flying.)