The TV presenter, 43, took to her Instagram Stories on Friday night to post a photo of herself wearing a cute floral dress that showed off her growing bump.
It came after mom-to-be Alex announced she was pregnant with her third child live on BBC One The One Show Thursday night.
In her post, Alex took a photo in what appeared to be her dressing room as she showed off her dress, which was from Nobody’s Child clothing store.
She paired the look with a pair of black boots and a pair of matching tights.
Alex combined the look with a pair of gold earrings.
In the first photo, she was holding her face with her hand on her hip as she posed for the camera.
Alex couldn’t help but take a look at her bump in the second snap she shared.
The TV star stepped aside and placed a protective hand on her stomach.
She posed with her eyebrows playfully raised for the photo.
“There she is,” Alex captioned it, followed by a pink love heart emoji.
Alex had said on The One Show: “This seems like a good time to share some news with everyone, the team and the studio.
“The lockdown has been anything but predictable and we have had some really unexpected news.
“Baby number three is on the way!” ”
She then confirmed that she was expecting a baby girl.
Then on Instagram, she posted a photo of herself and her husband Charlie with their sons Teddy, four, and Kit, who is almost two.
Alex called the pregnancy “the best surprise ever” in the post.