Kim Kardashian and Kanye West arrive holding hands to the opening of Scott Disick’s restaurant

Kanye West, who recently started dating Kim Kardashian, accompanied the whole family to the opening of Kourtney’s boyfriend Scott Disick’s restaurant where their every affectionate moment could be captured by the cameras.

Kim Kardashian and Kanye West arrived together holding hands, their first public declaration that they are in a relationship together.

The action was to say the least a rather large sign that the rapper is moving ahead with his relationship with Kim Kardashian quickly.

Kim Kardashian, 31, stepped out for the event looking elegant in a black tight-fitting pencil skirt and matching halterneck top with frill detailing at the bib.

She paired the look with some black satin and perspex pointy stilettos, a black weave clutch and two gold cuffs on each of wrists.

Kanye West, 34, appeared to be matching his outfit to his girlfriend’s.

He looked dashing in a black tuxedo-style suit with a simple grey T-shirt worn underneath.

Kim Kardashian and Kanye West arrived together holding hands to the opening of Kourtney's boyfriend Scott Disick's restaurant

However, it was pregnant Kourtney Kardashian who stole the show in the fashion stakes.

Kourtney Kardashian, 33, kept her baby bump underwraps in a black and white maxi dress to celebrate her boyfriend new business coup.

Her boyfriend, Scott Disick, has teamed up with nightlife impresario Chris Reda to introduce the Meatpacking District’s new restaurant, RYU.

RYU will offer delectable Japanese-inspired cuisine and world class cocktails in a chic dining space.

Scott Disick was as per usual dressed-to-the-nines in a black double-breasted suit, a checked white shirt and paisley printed tie.

Khloe Kardashian, 27, opted for a thigh-skimming animal print mini dress, which she paired with a cropped leather jacket and bright orange heels.

The two youngest siblings, Kendall, 16, and Kylie, 14, also went for shorter styles.

Kendall Jenner opted for a bold multi-colored striped dress, while Kylie looked like she had raided older sister Kim Kardashian’s wardrobe, slipping on a pleated mini-skirt, a bright yellow blouse and a black jacket.

Kris Jenner meanwhile showed off her curves in a black and white patterned body-con dress.

But she kept her figure somewhat undercover by wearing an oversized black tuxedo jacket over the top.

Yesterday, Khloe Kardashian insisted her sister Kim’s relationship with Kanye West was not “serious” yet.

Khloe Kardashian – who with husband Lamar Odom enjoyed a double-date with the fledgling couple in New York last weekend – revealed things between Kim and Kanye West are only just getting off the ground.

Appearing on US show Watch What Happens Live, Khloe Kardashian said: “I don’t think it’s serious. I think it’s too soon. But because they’ve been friends for so long, it’s just so easy and that’s something I love seeing for Kim – the easiness and how happy she is. And it’s just more of a great friendship and friendships make the best relationships.

“We’ve known Kanye for like nine years. He’s great with the family, but again we’ve known him for so long. It’s not like some stranger getting into a hurricane.”