The reality star took to Instagram to post the smiling snap of her, hubby Rio Ferdinand and bump at home, and was flooded with compliments from her 1.3million followers.
Captioning the picture, the former Towie cast member wrote: "Happy Father's Day to you @rioferdy5 you are the best daddy to Lorenz, Tate & Tia ....(& Ronnie).
"Can't wait for our next chapter. Let's celebrate you today."
Dressed in a polka dot dress, Kate looks positively glowing.
"You look amazing! Congratulations to you all," wrote one follower.
"Every time I see a picture of you two it makes me happy," gushed another.
While a third chimed in: "Perfect family - happy endings are real."
Kate and Rio announced that they were expecting a baby together earlier this week.
The couple - who got hitched last year after three years together - broke the exciting news to fans by sharing a super-cute video of the moment they told Rio's children: Tate, 11, Lorenz, 13 and Tia, nine.
If you're in need of a good old cry, just watch the clip above.
In the video, step-mum Kate, 29, passes around a family a photo album full of pictures of the kids as babies.
There's chat about the images, including childhood memories, family in-jokes, and talk about who resembles who.
Then, the final page reads: "Now for the next chapter... Guess what?"
It's at this point that the kids cotton on to what's happening.
"WHAT!?," Tia exclaims excitedly, while Lorenz leaps up from his chair and gasps.
"I'm pregnant!," Kate announces. "I am, have you not noticed guys?"
Cue big group hugs while proud dad Rio, 41, beams in the background.
Seriously, we were not emotionally prepared for this.
Earlier this month, the Ferdinand family were seen out showing their support for the Black Lives Matter movement, attending protests in London.
In an Instagram post, Kate wrote about the experience: "Such a moving & overwhelming experience for us today.
"Honestly, we were cautious about going and taking the children, but we are so glad we made the decision to go, it's something we will all remember for the rest of our lives. It felt so good to be part of the movement.
"Our kids are the future, for us it's so important for them to understand what is happening in the world and be part of the change, we need to continue to educate ourselves and the younger generation."
Amen to that!
Huge congratulations to Kate, Rio and all the family.
Featured Image Credit: Instagram / Kate Ferdinand
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