Tony Curtis’s accent as “Junior” in Some Like it Hot is the epitome of this type of hoity-toity speak. (Of course, his character is faking the accent in order to sound like a rich guy. And Sugar eats it right up.)
Tony Curtis was imitating Cary Grant.
'Course there is. It’s called “Anchorman English.” Most news broadcasters speak it. The American equivalent of the BBC’s “Received Pronunciation.”