The 33-year-old star revealed earlier this week that she and husband Joe Swash are expecting another baby and now she's admitted she will give birth next month after not finding out she was expecting until she was "a lot further along" than when "you usually tell people" but still wanting time to enjoy the news in private first.
She wrote on Instagram: "Coming soon… Much sooner than we thought. "When we found out we still wanted to have that first few months you usually would to adjust and get excited and enjoy it to ourselves, but that didn't leave us with very long left.
"So this time next month we will be getting ready to say hello to a whole new pickle... So grateful.
"While we had some time off we thought we better take some memories before it's too late."
The 'Loose Women' star - who has Zachery, 14, and Leighton, 10, from previous relationships and Rex, three, and 14-month-old Rose with Joe, as well as being stepmother to her husband's 15-year-old son Harry – had earlier admitted her pregnancy had come as a "real surprise".
She said in a video message thanking fans for their wellwishes: "Hello everyone, I just wanted to come on here and say thank you for all your lovely messages. Your comments and everything, I've been reading through them, they're just so nice.
"Sorry I've been so quiet I've just been trying to spend as much time as possible with this lot,' as she pans the camera to one of her little ones playing with a toy. "So me and Joe got a couple of days off for Christmas and New Years, and we just try and give them loads of attention but I just wanted to say thank you so much - you're honestly so lovely and so kind.
"We actually found out way later than we would usually, so we're a lot further along than when you would usually tell people! "So we are really, really nervous and it was a real surprise but we're so grateful and really excited for what's to come!(sic)"
Stacey also dismissed speculation from fans that she knew she was pregnant when she and the former 'EastEnders' star got married in July. She wrote in the comments: "For those saying you knew when we got married, well you could have let us know Poirot."
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