'Parachutes' singer Cheryl uploaded the sweet picture to Instagram on Monday night (24 February), adding the caption: "Emotional hugs for an emotional day…"
Cheryl and Kimberley's faces are obscured in the photo – as is Kimberley's stomach, so there's no getting a glimpse at any little baby bump!
Ex-Strictly Come Dancing star Kimberley shared her exciting baby news via Twitter on Monday afternoon, saying that she and long-time boyfriend Justin Scott are expecting their first child together.
In a Twitter post, the 32-year-old said: "Couldn't wait to share our lovely news with you all. Justin and I are so happy to let you all know we are having a baby!!!"
Girls Aloud bandmate and close friend Cheryl was among the first to publicly send her congratulations to Kimberley although, of course, she already knew!
Cheryl, who is just back in the UK from Milan Fashion Week, tweeted: "@KimberleyJWalsh FINALLY, I thought at one point I was going to burst!"
Kimberley and Justin have been together for more than ten years, and she told Reveal recently: "I have got so many babies around me at the moment - friends, family and my sister is expecting again, so I'm going to be an aunty for the second time.
"I love kids so it's something I'm definitely going to do in the future."
This will be the second Girls Aloud baby, following the birth of Nadine Coyle's daughter, which was announced in February 2014.
Nadine and her former American footballer boyfriend Jason Bell have yet to reveal any details about their little girl – including a name or the exact date of her birth. All Nadine has said so far is: "She is amazing. I love being a mammy & will fill you all in soon."
Stars send congratulations to pregnant Kimberley Walsh - pictures: