The American actress stepped out in a black mini dress from designer Christian Siriano – as she appeared on Jimmy Kimmel’s chat show, Jimmy Kimmel Live!

The tight bodycon dress was shoulder-less, and bolstered with bold tulle sleeves and cropped high above her legs.

It meant Gaga was able to show off her enviably long legs and killer figure – and she looked as confident as ever.

Lady Gaga looked all the rage in her tiny black dress (Image: GC Images)

The American actress accessorised her hot new look with a pair of chic sunglasses and stylish black heels.

Gaga styled her trademark blonde hair in a straightened shape – allowing it to fall onto her shoulders and frame her face.

It comes as the multi-talented Hollywood star has been promoting her latest flick, House of Gucci, where she plays Patrizia Reggiani.CrossoutCrossout: New Apocalyptic MMOby TaboolaThe Hollywood beauty appeared on Jimmy Kimmel’s chat show – and she was dressed to the nines

During her interview with Jimmy Kimmel, Gaga spoke about her House of Gucci role – and how she stayed in her character’s Italian accent all day long to avoid losing it.

As she explained her accent method, she slipped into her Italian accent to demonstrate her skill.

She said: “I spoke in my accent all of the time so that I could get really used to talking to somebody with my accent and have a really normal conversation, so that I could just be in my body and talk.

Lady Gaga played Patrizia Reggiana in House of Gucci (Image: Fabio Lovino)

“It was really great for me on set, but with my friends and family you know, they had to get used to it.”

The singer recently said that she dyed her own hair brown, and it became the “most important element” in becoming her character of Patrizia.

She told W magazine: “The most important element in becoming Patrizia was dyeing my own hair brown. I couldn’t be blonde with that Italian accent—I was still myself. It was also important to me that the film not be a red carpet: Fashion was a key part of Patrizia’s survival. She tried so hard, but she was never as shiny as the Guccis.”