At last week's True Grit premiere, Barry Pepper had only great things to say about his young co-star, Hailee Steinfeld. "She was extraordinary," Pepper told Vulture. "She was 13 years old at the time, we’re up in these snowy brutal conditions up in the mountains above Santa Fe, and she’s getting drug through rivers and having to ride horses and shoot guns. And she was just an absolute professional." But there was one big reminder that Hailee wasn't as experienced as the rest of the cast: a swear jar she implemented on set. Steinfeld explained: "About a month into filming, I felt like everyone was just dropping F-bombs too casually. So it was kind of my idea and my mom’s idea and my teacher’s idea, because they were the main ones that didn’t want me to, you know, catch up on [the swearing]. I made about $350; I matched it and donated it to Alzheimer’s Foundation." For more celebrity quotes, click through our Party Lines slideshow.