That was fast.

The eldest child of Michelle and Jim Bob Duggar, Josh, is about to become a dad again. Josh and his wife Anna have announced they’re expecting their fourth child on Twitter.

“We are so excited to announce…we’re pregnant! #4andCounting #BlessingfromTheLord @joshduggar #19Kids,” Anna wrote on Tuesday night.

http://ivillageau.s3.amazonaws.com/wp-content/uploads/files/2014-12-04_14-10-26.jpg Anna and Josh with their children Marcus, MacKynzie and Michael.

The pair already have three children, MacKynzie, 5, and Michael, 3, and Marcus, 18-months.

In a video message shared on the TLC website, Anna reveals her pregnancy hasn’t been easy as she explains, "I am nine weeks pregnant and I'm having a lot of morning sickness, so it is difficult, but it's good because I know that good things are happening.”

http://ivillageau.s3.amazonaws.com/wp-content/uploads/files/2014-12-04_14-11-00.jpg Anna and Josh Duggar.

The couple announced the news to the rest of the Duggar family just after Ben Seewald and Jessa Duggars wedding.

It has also been announced that Jill Duggar and her husband Derick Dillard who are expecting their first child will be welcoming a baby boy.

SCROLL THROUGH the gallery for more pictures of the Duggar family...

The Duggar family

The Duggar family

The Duggar family

Jill Duggar

The Duggar family

Jessa Duggar and her husband Ben

Jessa Duggar and her husband Ben

Jessa Duggar and her husband Ben.

The Duggar family

Jim Bob and Michelle Duggar

The Duggar family

Jessica Duggar with her husband Ben Seewald

Josh and Mackenzie Duggar

Praying - Ben Seewald and Jessica Duggar

Mackenzie and Josh Duggar

Jordyn-Grace, Josie and Mackenzie being silly

Duggar family outing

The Duggar family

The Duggar family

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