'19 Kids and Counting' star Jill Duggar pregnant with first child

Well, that was fast!

Newlywed Jill Duggar, of TLC’s “19 Kids and Counting,” and her husband Derick Dillard have announced they are expecting a baby.

The pair wed on June 21, and their baby is due in March, People magazine reported.

"We were shocked," Derick Dillard, 25, told the mag. “Both of us are so excited."

The 23-year-old TLC starlet added that she didn’t initially think she was pregnant because she had taken two pregnancy tests, and they came back negative. Then, she was visiting with her sisters at her mother’s home and they convinced her to borrow one of her mother's pregnancy tests and give it another go, but she was skeptical.

More On This...

“It was more like to prove them wrong, like ‘I’m not pregnant. I’m going to show you so,’” Jill recalled. “We came out with kind of shocked look[s] on our faces. They were like ‘you are?’”

The couple said they shared the news the next day with their parents.

"About 30 days after Jill and Derick got married they gathered everyone in the living room and shared the news," Jim Bob Duggar, 49, told People. "Everyone was clapping and cheering, and we were in shock, too."

Click here for more from People magazine.

WATCH: Four4Four: Lindsay Lohan flat broke in bar?