Who knew Hollywood had such a potty mouth?

Actresses Sally Field and Julia Roberts participated in a "Celebrity Curse-Off" on Monday's episode of "Jimmy Kimmel Live". The "Steel Magnolias" co-stars competed at the chance to show off their vocabulary of swear words.

"We are honored to have both Sally Field and Julia Roberts on the show tonight, and it's also an opportunity to find out which of these incredibly talented women has the foulest mouth. Cover your ears, America, because it's time for our first-ever Celebrity Curse-Off!" Kimmel said before the challenge. "The rules are very simple: each of our contestants will have five seconds to come up with a curse. No repeats allowed...whoever can't come up with a word will lose this competition."

"Why am I in a curse-off with 'The Flying Nun?'" Roberts asked at one point. "How does this happen?"

Field responded: "We'll see who's the 'Flying Nun.'"

Roberts struggled to come up with words, covering her face with her hands in embarrassment. Field, 67, had a much easier time forming words, even admitting to using a phase often said by her son and at one point during the competition taking out a cheat-sheet.

"This is a massacre," Kimmel joked. All curse words were censored for TV.

"The Amazing Spider-Man 2" actress won the competition and was awarded with a giant bar of soap, which Kimmel hung around her neck as confetti rained.

Before the game, Field gushed about being honored on the Hollywood Walk of Fame, as well as celebrating 50 years in the entertainment industry.

"To have a long-term career, you have to want what you want, more than you think you're capable of wanting," Field said. "You have to constantly step aside anything having to do with ego, entitlements, and just head for the work wherever it might lead. I've worked my whole life, and feel the many miles I have accumulated in this saddle. And I can tell you... in these last 50 years I have not ever, not once considered changing my mind."

Field received the 2,524th star and joins the Kate Winslet and Orlando Bloom, who both received stars this year.