Tiffany Trump is expecting her first child, her father Donald Trump revealed on Thursday.

The former president was speaking at the Detroit Economic Club when he made the announcement.

He recognized several guests in the crowd, including businessman Massad Boulos, who is Tiffany's father-in-law, and then delivered the good news.

'He happens to be the father of Tiffany's husband, Michael, who's a very exceptional young guy,' Trump told the crowd. 'And she's an exceptional young woman. And she's going to have a baby. So that's nice.'

Tiffany Trump (R) with her mother Marla Maples (L)

Tiffany Trump (R) with her mother Marla Maples (L)

Tiffany Trump with her husband Michael Boulos

Tiffany Trump with her husband Michael Boulos

Tiffany Trump, daughter of former President Donald Trump, pre-records her address to the Republican National Convention inside an empty Mellon Auditorium on Tuesday, August 25, 2020 in Washington, DC

Tiffany Trump, daughter of former President Donald Trump, pre-records her address to the Republican National Convention inside an empty Mellon Auditorium on Tuesday, August 25, 2020 in Washington, DC

The audience applauded enthusiastically and Trump thanked them.  He did not say when the baby is due. 

Tiffany's baby will be the former president's 11th grandchild. Son Don Jr. has five children, Ivanka Trump has three, and Eric Trump has two.

The 30-year-old married Michael Boulos at her father's Mar-a-Lago estate in November 2022. 

She is the daughter of Trump and his second wife Marla Maples. She keeps a lower public profile than her older siblings. 

Tiffany also is not involved in the family business. She graduated from Georgetown University Law Center in 2020. 

She has not been heavily involved in her father's political efforts although she did attend the Republican National Convention in Milwaukee this summer.

Boulos was born in Lebanon and is the 27-year-old heir to Boulos Enterprises, a Nigerian distribution and assembly company for vehicles including motorcycles and power bikes, run by his father. 

Donald Trump announced daughter Tiffany's pregnancy during his speech

Donald Trump announced daughter Tiffany's pregnancy during his speech

Tiffany with her sister Ivanka at her 2022 wedding

Tiffany with her sister Ivanka at her 2022 wedding

Marla Maples Trump and Donald Trump with daughter Tiffany Trump outside the Minskoff Theatre in New York City in March 29, 1994

Marla Maples Trump and Donald Trump with daughter Tiffany Trump outside the Minskoff Theatre in New York City in March 29, 1994

The couple started dating in 2018. They met when Tiffany was on vacation in the Greek Isles with actress Lindsay Lohan.

Boulos proposed in the White House Rose Garden with a 13-carat emerald-cut diamond ring worth $1.2 million.

Massad Boulos has been helping Trump with the influential Arab-American community in the swing state of Michigan.

Ivanka, left, and Tiffany Trump, the daughters of former President Donald Trump, are seen in the Fiserv Forum on the last night of the Republican National Convention in Milwaukee, Wis., on Thursday July 18, 2024

Ivanka, left, and Tiffany Trump, the daughters of former President Donald Trump, are seen in the Fiserv Forum on the last night of the Republican National Convention in Milwaukee, Wis., on Thursday July 18, 2024

Tiffany Trump, daughter of former U.S. President Donald Trump, speaks during the Republican National Convention at the Andrew W. Mellon Auditorium in Washington, D.C., U.S., on Tuesday, Aug. 25, 2020

Tiffany Trump, daughter of former U.S. President Donald Trump, speaks during the Republican National Convention at the Andrew W. Mellon Auditorium in Washington, D.C., U.S., on Tuesday, Aug. 25, 2020

Donald Trump and Tiffany Trump during Tiffany Trump at her wedding in Palm Beach

Donald Trump and Tiffany Trump during Tiffany Trump at her wedding in Palm Beach

In June, Tiffany made a rare public appearance in the U.K. when she joined her mother Marla Maples at Cambridge University, where the former actress and model was giving a talk at the college's Union.

Tiffany did not join her mother up on stage at the event, where Marla was billed as an 'actress, television personality, model, humanitarian, singer, presenter, ambassador, and mother.'

Tiffany was later seen making her way into a black cab after attending a dinner that was hosted by her mother at a 'high-end' Mayfair restaurant.

Two weeks before that she put on a public show of support for her father Donald at his hush-money trial in New York City.