All the celeb guests at Meghan Markle's baby shower

The Duchess of Sussex has been in New York City this week, catching up with some of her closest friends before her baby arrives in April.

While it’s believed that Meghan, 37, spent a couple of days in the city under the radar, details about her baby shower at The Mark Hotel on the Upper East Side emerged on Tuesday.

There were definitely no corners cut in the decorations for the affair – florists were pictured delivering bouquets of pink roses as well as an orange tree – but it was the celebrity guest list that really got people’s tongues wagging.

The celebrations are said to have been organised by Meghan’s best friend and stylist, Jessica Mulroney, (who arrived at the royal wedding in May with the Duchess of Cambridge and the bridesmaids and page boys), tennis star Serena William, actress Priyanka Chopra and George Clooney’s wife Amal Clooney.

Sources told Harper’s Bazaar that the NYC baby shower is the first of two the Duchess will be hosting.

Around 15 to 20 of the Duchess’ closest pals joined her for the get-together, while a smaller gathering has apparently been scheduled for friends in the UK, after Meghan returns from her trip to Morocco with Prince Harry this weekend.

So who attended?

Jessica Mulroney

Canadian fashion stylist Jessica Mulroney has helped to organise the bas. The pair first met when Meghan relocated from Los Angeles to Toronto for her role on the legal drama Suits.

She and husband Ben Mulroney attended Meghan and Prince Harry’s wedding in May last year and their twin sons Brian and John and daughter Ivy were page boys and bridesmaid.

After the Duchess landed in New York, she and Jessica reportedly had macarons and tea at the famed French bakery Ladurée in SoHo on Saturday.

Priyanka Chopra

The actress, who wed Nick Jonas in December, is believed to have flown in for Meghan’s baby shower, royal correspondent Omid Scobie told Good Morning America.

Priyanka met Meghan at an event hosted by Elle magazine, which celebrated women in TV. She also attended the royal wedding last year.

Serena Williams

The US tennis star is also said to have played a part in organising the baby shower.

Serena, 37, posted a photo on her Instagram account earlier today, showing her outfit for today’s festivities.

She attended a dinner with the duchess and Jessica Mulroney, at The Polo Bar, Ralph Lauren’s restaurant in Manhattan on Tuesday night.

Serena and Meghan are believed to have struck up a friendship at the Super Bowl in 2010.

The duchess has supported her friend at Wimbledon over the years, cheering her on at the Ladies’ Single Final with sister-in-law Kate last July.

Serena and her Reddit co-founder husband Alexis Ohania attended Meghan and Harry’s wedding on May 19 in Windsor. The tennis champ looked elegant in a pale pink number by Versace for her pal’s special day.

Amal Clooney

Amal Clooney also arrived at The Mark Hotel in New York City for the celebrations.

The wife of George Clooney looked chic in a satin red jumpsuit and a black coat.

Her bodyguard also had some gift bags in tow, presumably for the Duchess of Sussex.

The 38-year-old is reportedly co-hosting the celebrations along with Serena.

While it’s not known how Meghan and Amal met, it was previously reported by People that the human rights lawyer helped Meghan “settle into London life”.

Gayle King

The CBS This Morning anchor, 64, wrapped up against the winter chill in a purple coat and a tonal scarf, and carried a polka dot gift bag.

Gayle is also friends with talk show host Oprah Winfrey, who is also rumoured to be among the attendees.

Abigail Spencer

Meghan’s former Suits co-star, Abigail Spencer, headed out for lunch with the royal on Tuesday.

The Duchess, wearing a black Courrèges vintage coat with Hatch maternity jeans and carrying a Carolina Herrera bag, had a bite to eat with Abigail at Café Boulud within The Surrey Hotel.

According to Hello, the pair originally went to the Flora Bar inside the Met Breuer museum – but left shortly afterwards. It’s thought that the venue wasn’t private enough.

Misha Nonoo

Fashion designer Misha Nonoo was among the guests at the baby shower. She was photographed arriving at The Mark hotel with a gift bag.

She is believed to be the person who introduced Meghan and Harry on a blind date and recently announced her own engagement to oil heir Mikey Hess.

Meghan has worn several of Nonoo’s designs, most famously the Husband Shirt she donned for her first public outing with Harry at the Invictus Games in Toronto in 2017.

Markus Anderson

The Soho House director was also spotted with Meghan and friends after their dinner.

It’s believed the pair met when they both lived in Toronto and have shared getaways with fellow pal Misha Nonoo.

The duchess changed her outfit for the dinner, opting for her Victoria Beckham coat, jeans and Tamara Mellon boots.

She and Harry will fly to Morocco on Saturday for a three-day visit, at the request of the UK Government.

Got a story tip? Send it to lifestyle.tips@verizonmedia.com

Want more lifestyle and celebrity news? Follow Yahoo Lifestyle on Facebook, Twitter and Instagram.

Or sign up to our daily newsletter here.