"I always assume my career's going to end tomorrow, you know what I mean?" the House of Lies star, who's been engaged to Dax Shepard since 2009, tells the new issue of Flaunt. "We're very frugal."
Bell adds that they're "hillbillies at heart, and I'm not f-cking ashamed of that."
Bell -- who next appears alongside Drew Barrymore and John Krasinski in Big Miracle -- says her life with Shepard, 37, improved once she finally realized it's OK to make mistakes.
"I think perfection is unrealistic and unattainable, and I felt freed when I let myself be who I am," Bell tells Flaunt. " Like, I'm gonna order red velvet pancakes. Life is f-cking short and these are delicious."