Yah, Lillian Reardon, I could see her as adequate in that role. Or Betty Pope. Wait, wait...CHERYL Taggart, that's it, the poor shop clerk whom Jim Taggart marries. PERFECT!
What's **REALLY** wrong with casting her as Dagny is that the book specifically states that Dagny is 35. The Jolie twit can't be more than 27, I shouldn't think.