Anne Hathaway promotes sustainable fashion, wears $15 flea market dress.

Anne Hathaway has plenty to smile about.

The busy actress was glowing on Monday in New York City while wearing a chic dress that she found at a bargain price, and it is a lifestyle choice that she believes will help the planet.

‘This is a $15 flea market dress,’ the Oscar winner revealed to Robin Roberts during her appearance on Good Morning America. ‘I’m trying to be more sustainable with my fashion choices, so I’m trying to wear vintage wherever I can.’

What a deal! Anne Hathaway poses in a $15 ‘flea market dress’ outside of the Good Morning America studios on Monday in New York City

Bargain beauty! The Oscar winner’s vintage dress was an effort to save the planet through sustainability

The Devil Wears Prada star had on a floral-print black dress that featured frayed seams along the skirt and shoulder hemlines.

She complemented the outfit with a brown, red and green belt, red pumps and a checked clutch. Her brown tresses were styled loose and in a part, and she accessorized with hoop earrings and large sunglasses.

The Princess Diaries actress posed for photos outside of the studio as she made her way to promote her forthcoming movie Colossal.

The full package: She complemented the outfit with a brown, red and green belt, red pumps and a checked clutch

Seasonal style! The Devil Wears Prada star had on a floral print black dress that featured frayed seams along the skirt and shoulder hemlines

In the science fiction comedy opposite Jason Sudeikis, she portrays Gloria, a woman with a drinking problem who has a psychic connection to a Godzilla-like monster in Seoul.

Anne said that she told her agent she wanted to do ‘something different’ from her usual cinematic fare.