One and done! In Sienna Miller's newest role in "Burnt," she plays a sous chef. In real life, she once worked in the food service industry. Let's just say it didn't work out.

"I did a waitressing job for a day," she told Stephen Colbert on "The Late Show" on Monday. "It was an Italian restaurant and some man was really quite inappropriate. He slapped my bum and I poured pasta on his lap... and got fired."

Her next job after? She was in clothing sales. She lasted two days there before getting sacked. She said she was "too enthusiastic."

Apparently not cut out for the service industry, she found her calling in acting. However in her latest role in "Burnt" she discovered a newfound passion and talent for heating up the kitchen. For the film starring opposite Bradley Cooper, she trained extensively with a two-star Michelin chef. He even raved about her skills and said he would hire her.

"It was very nice," she said. "Did it change the way I cook? It did for like a month and then I reverted back to my old ways of slopping."

Watch the clip below.

https://www.youtube.com/watch?v=DKhoqYQk9No