Let's just assume for a moment this would be a major motion picture, and not an independent film. Who would you cast?
Here's how I picture it...Emma Stone as Holly Hallstrom, Margot Robbie as Dian Parkinson, and because there would need to be some comic relief, Frank Caliendo as Rod Roddy.
For Barker, I have two ideas. First, Tom Hanks. He has a history of playing famous people (Walt Disney, Mister Rogers), and since he played Sully Sullenberger, we know he'd look good in a white wig!
Otherwise, how about Walton Coggins? He's played two game shows host before (Peter Tomarken and Baby Billy!) and he'd bring the right amount of....sleaze to the role that this production would probably be aiming for.
Any other suggestions are welcome!