Sienna Miller and Cara Delevingne at charity event in New York 

Sienna Miller looked fabulous as she joined a flawless-looking Cara Delevingne on Monday at an event to raise awareness for Youth Mental Health in Manhattan.

Actress Sienna, 41, wore a cream dress with green embroidery that added a pop of color to her look with a sleek ruby ​​lipstick.

Model Cara, 30, wore a peplum top and brown trousers as she showed off her short hair, which was styled in a sleek bob.

The event was held to celebrate the charity’s 10th year and a host of other famous faces turned up to show their support.

Demi Lovato, 30, wore a graphic print jacket over a black ensemble as she posed for photos with Vogue icon Anna Wintour, 73.

Stunning: Sienna Miller, (left), looked fabulous in a green embroidered dress as she attended a charity event in New York on Monday with the flawless looking Cara Delevingne

Special moment: the event was held to celebrate ten years of Youth Mental Health in Manhattan

Friends: Sienna gave Cara a big hug during a conversation with Anna

Smile! Vogue icon Anna also took a moment to pose with singer Demi Lovato

Shoe designer Tamara Mellon, 55, was also present and wore oversized glasses.

The outing comes after Sienna revealed she would be moving back to London after falling “out of love” for New York.

She currently lives in the city with her 10-year-old daughter, Marlowe, who she shares with her ex-fiancé Tom Sturridge.

Speaking to Bruce Bozzi on his podcast, Sienna revealed that she was initially “in love” with New York when she was 18 and thought it was a “powerful place.”

But when the host asked why she decided to move now, Sienna recalled a hugely unpleasant incident that happened shortly after she bought her house.

She said, “I’ve been renting for years. My kid has moved from place to place to place, it’s nomadic and that’s what it’s like to be an actor,” she said.

“But I was like, no, New York is my home, so I bought a house in the West Village.

“A week after I moved in I opened the front door to take my daughter to school and there was a human s*** at my door.”

She added, “You can never feel the weight of a human sex. I just hoisted her over the human s*** and got her to the bus.’

Fashion queens: Anna and Sienna look like they get along and have posed for many photos together

Stars: (L-R) Anna, Cara, Sienna and Chioma Nnadi were all present

Something to say: It seemed that Anna and Demi were in deep conversation

Street style: Demi rocked a quirky black and white coat over a black ensemble

Erin: Cara was pictured listening intently to the speakers on stage

Her turn: she also had something to say when she addressed the audience

No FROW here: Cara was a bit behind Anna during the event

Make an entrance: shoe designer Tamara Mellon was also present