Donald Trump’s mother-in-law, Amalija Knavs, passes away at 78.

On Tuesday, the former first lady Melania Trump shared the tragic news on her official social media account.

She penned on X (formerly known as Twitter), "It is with deep sadness that I announce the passing of my beloved mother, Amalija.”

Melania added, "Amalija Knavs was a strong woman who always carried herself with grace, warmth, and dignity. She was entirely devoted to her husband, daughters, grandson, and son-in-law. We will miss her beyond measure and continue to honor and love her legacy.”

This news comes after Donald shared that his wife couldn’t attend a family gathering during the holiday season because she was meeting her mother.

An insider told PEOPLE that Melania was not at the Donald's New Year's Eve celebration.

The viral video from the New Year's celebration featured the American politician saying, "Melania — great first lady, so popular, the people love her — she's now in a hospital with her mother. Her mother, Amalija, is very ill, but hopefully she'll be recovering."

He added, "But she's been very ill, so I just want to say 'hello' to the first lady — we just spoke, down in Miami, great hospital — and hopefully they'll be ok. But it's a tough one, it's a very tough one. She knows probably about 95% of the people in this room. We just want to wish Amalija that she gets better as quickly as possible.”

The reason for Amalija’s death has not been revealed yet.

"[Amalija] has an excellent relationship with Melania and with Barron," the source continued.