Inside the Preparations for Meghan Markle's Exclusive Baby Shower

Serena Williams will reportedly help host the baby shower.

Meghan Markle's closest friends are throwing her a baby shower with an exclusive guest list at a luxury Manhattan hotel.

Serena Williams, Amal Clooney, and Meghan's former "Suits" co-stars Sarah Rafferty and Abigail Spencer are reportedly attending the shower, which is expected to take place Wednesday.

Meghan, who is due to give birth this spring, is staying at The Mark hotel, a high-end boutique hotel known for its celebrity guests. Flowers were seen being delivered to the hotel ahead of the celebrations.

The party is reportedly being hosted by her best friend and stylist, Jessica Mulroney.

Ahead of the celebrations, a box containing a stroller from Babyletto, which doubles as a crib, was seen being taken inside, while Abigail Spencer was seen carrying a gift wrapped in blue paper, perhaps suggesting the royal couple is expecting a boy.

On Tuesday, Meghan visited the Flora Hotel for lunch. It's located on the lower level of the Met Breuer Art Museum in the Upper East Side.

It is the first time Meghan has been in New York City since her wedding to Prince Harry last May.