Jurgen Prochnow and Roland Kickinger star as the older and younger Arnold Schwarzenegger, respectively, in a surprisingly funny biopic following the California gubernatorial race intercut with young Arnold's pursuit of the “Mr. Olympia” title in the '70s. Maria Shriver: Mariel Hemingway. Arianna Huffington: Nora Dunn. Don Sipple: Bob Morrisey. Paul Miner: David Burke. Mike Murphy: Pat Skipper.