Rare Footage of Garland, Bacall, and Sinatra at a Noel Coward Performance in Vegas

Discovered some fascinating footage of a Noel Coward performance at the Desert Inn in Vegas, thanks to The Judy Garland Experience.  This must have been around the time Sinatra was doggedly pursuing Lauren to be his next wife, and it's interesting to see them being so chummy.  Garland looks great here, as the early to mid-fifties are my favorite period for her, both vocally and looks wise.  And, bonus points if someone can tell me who the sophisticated blonde is with Coward.  I'm guessing it's his wife.  Color me obsessed.