With her bare feet kicked up on the dash, Margaret Qualley may look like she’s as relaxed as can be in Once Upon a Time Hollywood. But with Quentin Tarantino behind the camera and Brad Pitt behind the wheel, she was secretly terrified. “I mean, how can you not be? I was just trying to soak up every minute, because I know this is a once-in-a-lifetime experience,” the 24-year-old actress tells EW.