The celeb couple took to Instagram this morning to share the news that they are expecting their first baby together.
Sharing a series of pictures of Stacey asleep, former EastEnders actor Joe, 37, was the first to make the exciting announcement on his social media page.
The star wrote: "Have been driving myself mad thinking that she’s bored senseless of me and can’t stand to be awake for longer than 10 minutes of my company...
"So you can imagine my delight to find out that she still loves me and my company very much she’s just been growing a baby.
"I can’t begin to describe how happy we are to be able to share this wonderful news. We've been so blessed with three incredible children that we've had the privilege of raising and we are forever grateful to have the chance to become parents to another wonderful child.
"It’s all very overwhelming and emotional and we couldn’t be happier right now."
Emotional Stacey followed up with a picture of the scan, adding: "Every time I go to write anything I sob so... what he said @realjoeswashy".
Taking to Twitter, the expectant star retweeted Joe's message and added: "Words aren’t working for me right now so ditto @realjoeswash" alongside a crying and yellow heart emoji.
Speaking on Good Morning Britain shortly after making the announcement, Joe said of his girlfriend: "She's all good, she's excited.
"We just can't wait for it to happen."
When quizzed on the due date, Joe refused to give any details away - simply saying that he "can't say now".
Stacey and Joe first started dating in January 2016 and the former X Factor star is already mum to 10-year-old Zachary and six-year-old Leighton, who she shares with ex Dean Cox.
Meanwhile, Joe is dad to 11-year-old Harry who he shares with ex-fiancee Emma.
Earlier this week, Stacey alluded to the tiredness that she is suffering from in her pregnancy in a candid Instagram post.
The exhausted mum tickled her followers when she shared a photo of her two sons playing computer games on separate TVs while she watched Friends.
Stacey confessed that she had "totally given up on parenting" on the first day of half term, adding: "Feeling like I’ve been stripped of every ounce of energy for no reason at all today."