Brad Pitt and Angelina Jolie are known for their pledge NOT to wed until gay marriage is legal.  Now, Kristen Bell and Dax Shepard are joining that pledge.

Because Kristen says they're not going to make The Big Mistake until gays can legally make that same mistake.

She says, "We've been very vocal about not wanting to be married in a state that doesn't allow that right to all of its citizens. We'll wait until California gets on the right side of history."