Nicky Hilton and her husband James Rothschild have given birth to a third child

Nicky Hilton and her husband James Rothschild have given birth to a third child ...

Nicky Hilton and her husband James Rothschild have given birth to their third child.

Hilton captioned a black-and-white Instagram photo on Tuesday, adding, Mom, dad, and big sisters could not be more enthused..

She did not mention her baby boy's name or the date of her birth.

In her February pregnancy Instagram post, the 38-year-old fashion designer cradled her baby belly with a smile.

The then-expectant star, who is also the mother of daughters Lily-Grace, 5, and Teddy, 4, wrote, "The greatest things in life come in threes."

Kathy Hilton and Ricky Hilton spilled the beans the following month, although the socialite did not disclose the sex of her coming husband.

In March, the 66-year-old businessman told Extra that his first grandson would be our son.

Im not speaking out of turn, he said, confirming that Nicky and the businessman, 37, had been telling people the news.

Kathy, for her part, gushed about how hard her youngest daughter was working during her pregnancy.

She's doing fantastic, according to the former actress, 63, who spoke at the time. You wouldn't know it, but she's got the bump.

Two months later, Nicky sent her mother a sweet shoutout for Mother's Day, calling Kathy the queen.

The businesswoman expressed her gratitude for your love, strength, guidance, and humor in a moving May tribute. You are beautiful inside and out and I am so fortunate to call you my mom. A mother is your first friend, your best friend, and your forever companion.

The New York native shared a video with Lily-Grace and Teddy, expressing how much she was privileged to be able to give birth to a newborn boy this year.

Nicky captioned the video. We're so excited to meet our little one this summer.

In the video, the model talked about her favorite thing about being a mother, describing the activities she used to do with her children.

Nicky explained that we watch cartoons and eat cereal and go to theme parks. [It's] my goal to be a kid again.

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