Donald Trump is about to become a grandpa for the ninth time.

Congratulations are in order for US President Donald Trump: he’s about to become a grandpa for the…oh, it’s for the ninth time.

Not the President’s first time at the grandpa rodeo show…

Nonetheless, Donald Trump is “very proud and happy” that his second son, Eric Trump, is expecting his first child with wife, Lara.

The pair shared the news that a baby boy would be joining #TeamTrump in September via Twitter.

.@LaraLeaTrump & I are excited to announce that we are adding a boy to #TeamTrump in September. It’s been an amazing year. We are blessed! pic.twitter.com/ENrhdxdziA

— Eric Trump (@EricTrump) March 20, 2017

Eric also told PEOPLE magazine that the couple – who married in 2014 – found out they were expecting on his birthday.

Lara added that Donald Trump was “so excited” about the news.

LISTEN: Is it time we stopped mocking Melania Trump?

“We were worried he’d blurt it out at a press conference!” she said.

Of course, President Trump tweeted his reaction to the couple’s baby news, wishing the pair “congratulations”.

Trump is already a grandfather to nine - Ivanka's three children with husband Jared Kushner and the five children of first son Donald Jr..

Eric and Lara said the hardest part now was to choose a name for their baby boy.

(Since Donald Trump Jr. and Donald Trump III are already taken...yes, really.)

"We really loved the name Charlie, but we'd already named our dog that, so it's out," Eric said.

Eric and I are excited to add a boy to our pack in September! ???? #BabyTrump

A post shared by Lara Trump (@laraleatrump) on Mar 20, 2017 at 8:27am PDT