Bella Hadid cuts a stylish figure in a brown trench coat as she heads to a Valentino fitting ahead of Paris Fashion Week

Bella Hadid cut a stylish figure in a brown trench coat as she touched down for the start of Paris Fashion Week .

The model, 27, looked effortlessly chic as she modelled an oversized trench coat over a plain black t shirt and black leggings on Sunday.

The brunette beauty added a pair of chunky motorbike boots to her off-duty look and carried a large black tote bag as she headed to a fitting at Valentino.

The star swept her hair back into a slicked back bun and added a pair of dark shades as she carried an iced coffee while talking to a friend.

The model landed in Paris ahead of the start of fashion week and later in the day was spotted with her hair down smiling as she was fitted ahead of her runway appearance.

Bella had also swapped out her dark sunglasses for light brown ones and seemed in good spirits.

The model's arrival comes after she was spotted enjoying the sun in Malibu with pals at the end of last month as her romance with her cowboy boyfriend Adan Banuelos heats up.

Bella set pulses racing in a lemon pastel yellow hued bikini - from the brand Frankies Bikinis - while enjoying a day in California.

The stunner - who is dating professional horse rider Adan - grinned ear to ear in her tiny pastel string two-piece during her beach day.

Bella showcased her flat midriff and her cleavage in the striking look as she frolicked by the ocean.

The dark haired beauty later added small framed glasses that had a yellow hued tint, as well as a delicate bracelet and ring.

The younger sister of Gigi Hadid arrived to the beach wearing a lace white mini skirt as a cover up.

Bella also enjoyed a quick beach photoshoot with her gal pals during their beach day.

Her beach sighting comes just weeks after her cowboy boyfriend Adan opened up about their romance.

Adan opened up their his girlfriend Bella during an interview on the podcast Along for The Ride, which dropped on August 6.

Adan, who is a Mexican-American horseman, emphasized the important of Bella understanding his lifestyle before their relationship progressed further.

'It was cool because I really wanted that to be a part of our relationship. You know, you start having feelings for somebody and you start thinking things like, "Man, maybe this is the rest of my life here" and knowing that she is that simple of a human being [and] that the material things aren't important — or the most important thing.'

Adan joked that having Bella in the 5th wheel trailer made it feel like a mansion.

'That 5th wheel has always felt small and then you get, you know, somebody that you enjoy spending time with and that 5th wheel went from a 5th wheel to a f*****g mansion.'

The athlete gushed about his girlfriend and how down-to-earth her attitude is, revealing that she would wake up at '2:30 am in the morning' to bring everyone breakfast during competitions.

'Being that consistent and that uplifting and positive and warm to everybody she meets and helping with horses and stuff like that it's just freaking amazing,' he stated.