A representative for the couple reveals to PEOPLE in an exclusive interview that on September 4, they became parents for the second time to a boy named Caspian Barron Hilton. Nicky Hilton, son of hotel magnates Richard and Kathy Hilton, is 32 years old, and his wife Tessa is 28 years old.

“Our hearts are overflowing with joy as we announce the arrival of our son, Caspian Barron Hilton. Milou is overjoyed at the prospect of becoming a big sister “according to a statement made by the pair.

According to the representative, the word Caspian is associated with growth and power.

In February, the couple revealed to their close circle of friends and family that they were expecting another child together. In March of 2020, the couple became parents for the first time to a girl whom they named Milou Alizée.

The couple announced at the time that they were expecting their second child “around the end of summer,” which would put their first child Milou and the new baby precisely 2.5 years apart.

Tessa found comfort in the fact that her sister-in-law Nicky Hilton Rothschild was also expecting at the same time.

Around the middle of June, the fashion designer who was pregnant at the time posted photographs on Instagram of herself and Tessa enjoying time in the pool.

Nicky captioned the photo with the phrase “Suns out Bumps out.” “Can’t wait for the cousins to finally have a chance to meet each other!”

A lovely baby shower was held for Tessa a month ago by Hilton Rothschild and her mother, who also helped host the event.

Tessa showed off some pictures from the little get-together that she had in Malibu with her mother-in-law. She wore a pink outfit that clung to her growing baby belly as she posed for photographs with her family and friends. The backdrops of the images were decorated with a nautical theme and included pink and blue flower arrangements.

Tessa captioned a carousel of photographs from the baby shower that she posted on Instagram with the phrase, “The most beautiful baby shower filled with so much love.” “Our hearts are so full of joy as we anticipate the arrival of our little angel.”

In 2016, Barron and Tessa first crossed paths on the island of Saint Barthélemy, and they ultimately decided to tie the wedding there in June of 2018.