Whitney Port is pregnant.

Whitney Port

Whitney Port

The former 'The Hills' star revealed she is "so excited" to be expecting her first child with husband Tim Rosenman on Instagram on Thursday (09.02.17).

Alongside a photograph of herself wearing a cropped T-shirt and underwear to show off her growing baby bump, the fashion designer wrote: "Oh hey! Just standing by the window in my underwear, with a BABY in my belly!!! DM me if you know what I'm supposed to do with this thing for how ever many years I'm supposed to be in charge.

"We are sooooo excited (sic)!!!!"

In a longer post on her official blog, the blonde beauty shared a number of other intimate images and admitted she and Tim, who got married in November 2015, were initially "a bit shocked" after finding out the happy news.

She wrote: "I peed on a stick and now I'm going to be a Mom! Timmy and I were a bit shocked, but so excited to begin this journey."

She added: "I can't wait to be a Mom, but the fact that there is another person inside there is seriously crazy!"

Whitney, 31, plans to share her pregnancy journey with her fans.

She wrote: "I'll be posting some videos and pictures along the way, so you guys can be a part of everything. It's been such an interesting and trying but amazing journey already. I can't wait to share my experience AND learn so much from all of you!"

Whitney's former co-star Lauren Conrad also recently revealed she is pregnant with her first child.

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