Liam Payne puts on a loving display with girlfriend Kate Cassidy as the pair join stars at Mert and Marcus’ party during Paris Fashion Week.

Liam Payne and his girlfriend Kate Cassidy put on a loving display as they arrived hand in hand at Mert and Marcus’ party during Paris Fashion Week on Friday night.

The singer, 30, had a serious expression as he arrived at the party wearing a stylish red leather jacket and matching red platform shoes.

Underneath, the former One Direction star opted for a striped button-down shirt and dark gray tailored trousers as he turned heads in a slightly quirky ensemble.

Meanwhile, his girlfriend Kate, 24, showed off her enviable curves in a tight cream-colored dress that enhances her figure.

The influencer put on a leggy display in the dress that featured a flowy skirt while she completed the look with simple black heels.

Taking to her Instagram, Kate also shared a cute mirror selfie for the couple as she praised Liam after the release of his new single Teardrops on Thursday.

She wrote: “24 hours since tears came out and I couldn’t be more proud and excited for you.”

Serena Williams also joined guests at the party as she wowed in a figure-hugging black diamond-print midi dress.

The star, 42, braved the cold in a sleeveless dress and opted not to wear heels with a simple pair of pink flats.

Combing her hair into tight blonde curls, the tennis champion looked absolutely radiant as she was seen talking on the phone.

Paris Jackson opted for a brown suede corset dress which then flowed into a sheer nude skirt.

The American model, 25, showed off her impressive array of arm tattoos in the garment, before being helped into the car, revealing her underwear through the see-through ensemble.

Precious Lee added a splash of color to the party as she showed off her mid-height in a blue patchwork-style two-piece suit worn under a long brown fur coat.

Barbara Palvin greeted fans while keeping it simple in a long black dress and leather jacket.

The Hungarian model, 30, married to actor Dylan Sprouse, completed the look with black leather ankle boots while she wore her hair back in a sleek bun.

Amelia Gray Hamlin caused a sensation when she was seen leaving the party in a strange white leotard that she wore under a long-sleeved sheer white dress.

The model, 22, kept her head down as she walked back to her hotel in a pair of white heels.