While big names like Emma Stone and Michelle Williams played Sally Bowles first, Sienna has her own hair look for the show. "It's all been very different," said Rohm. "Emma's version of Sally was a little bit more structured, so she had a more traditional finger-wave style. Michelle's hair was actually very simple. She came in with a short bob haircut, and we worked with her own hair texture." Since Sienna has a natural wave and texture, the hair crew played it up to create a curlier style.
After using hot tools night after night, a Broadway star's hair can get damaged. If you're also a curling-iron junkie, Rohm recommended using Bumble and bumble Hairdresser's Invisible Oil Primer ($27) before applying heat and Bumble and bumble Repair Blow Dry ($30), a serum-cream hybrid that remedies split ends. "You want anything with a little deep conditioner," Rohm noted. "You want to seal your ends and put some keratin back in."