Pregnant Joanna Gaines сelebrates 40th birthday with a new photo flaunting her baby bump

The reality star is expecting her fifth child soon, but that didn't stop her from celebrating her birthday in her own special way.

Joanna Gaines turned 40 on April 19, and she decided to share a photo to show her Instagram fans how she was celebrating the milestone birthday.

As reported by Daily Mail, Joanna took to the social media site on the big day to share a photo of herself in yoga pants, a loose grey hoodie that showed off her baby bump, with her hair tied in that just-got-out-of-bed look.

In the image, she can be seen munching gleefully on a donut with a cup of tea in her hand, as she rests her one foot up on a chair.

She captioned the image: "This is 40. And I like it... #pregnantandforty #anddoughnuts"

Naturally, the designer's house looks fabulous in the background, with rustic furniture and decor dotted around the room behind her.

Her husband, Chip Gaines, also shared a sweet birthday message for his wife, writing: "Happy birthday sweet girl! #40neverLookedSoGood."

The couple shared their pregnancy news in January, and announced that baby number five would be a boy, who should be making his appearance some time in the summer.

Joanna and Chip are already parents to Drake, 12, Ella, 11, Duke, 9, and Emmie Kay, 7.

The star couple are known for their reality show Fixer Upper. Sadly, the show has come to an end with the finale of the last season, but they are appearing in a spin off show, Fixer Upper: Behind the Designs.

The new show will take fans behind the scenes to see how Joanna comes up with the creative designs that have been featured on the show before. The spin-off airs on Tuesday nights on HGTV.