Tessy Antony De Nassau, former princess of Luxembourg, welcomes a baby boy one month after wedding

The former royal took to Instagram and shared a beaming selfie with her spouse and their new baby

It’s a boy!

Tessy Antony De Nassau, the former princess of Luxembourg who was married to Prince Louis of Luxembourg, has welcomed a son named Theodor with Frank Floessel.

The 35-year-old married the Swiss businessman last month.

The former royal took to Instagram on Thursday and shared a beaming selfie with her spouse and their new baby.

TESSY ANTONY DE NASSAU CONGRATULATES EX-HUSBAND PRINCE LOUIS OF LUXEMBOURG ON HIS ENGAGEMENT

"Our little Theodor," she captioned the snap.

De Nassau’s eldest son, Prince Gabriel, previously shared the news in a video message on his mother’s social media page.

Tessy Antony De Nassau, the former Princess of Luxembourg, shared the happy news on Instagram.

Tessy Antony De Nassau, the former Princess of Luxembourg, shared the happy news on Instagram. (Getty Images)

"Frank, our children and I are happy to announce that our little bean has arrived," his mother captioned the post. "Theodor is healthy and a very active little man. We are over the moon with joy."

De Nassau’s ex-husband also had a recent life update. Back in April, the Grand Ducal Court of Luxembourg announced that the 35-year-old was engaged to French lawyer Scarlett-Lauren Sirgue, 29.

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"We are very happy to announce the engagement of our son, Prince Louis, to Miss Scarlett-Lauren Sirgue," the prince’s parents – Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg – shared in a statement. "[Louis's sons] Princes Gabriel and Noah join us in surrounding the new couple with all our affection. We wish them immense happiness."

At the time, De Nassau also shared a message of congratulations on her Instagram story.

The Grand Ducal Court of Luxembourg announced that Prince Louis of Luxembourg is engaged to French lawyer Scarlett-Lauren Sirgue.

The Grand Ducal Court of Luxembourg announced that Prince Louis of Luxembourg is engaged to French lawyer Scarlett-Lauren Sirgue. (Private Collection of the Grand Duke and Grand Duchess of Luxembourg)

"Finally its out too," she wrote. "Gabe, Noah, Frank and I are so happy for you both and wish you only the best and much happiness.

Louis and De Nassau were previously married from 2006 until 2019. The former couple met while they were both serving in the army. They share two sons.

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Since her divorce, Antony has taken on the roles of humanitarian and businesswoman. She launched a podcast titled "Tessy Antony de Nassau’s Zoom O’Clock" in 2020.