Jacqueline, who plays Lauren Branning in the BBC One soap, posted the photo on Instagram earlier today showing the pair enjoying a sunny holiday in Egypt.
Jacqueline, who is wearing a yellow bikini in the photo, looks blissfully happy as a smiling Dan conceals part of her tummy by resting his head on her.
Captioning the photo, Jacqueline simply inserted a sun and heart emoji.
This is the first time Jacqueline has been pictured after announcing that she is expecting her first child with Dan. This will be Dan's second child, as he is already father to eight-month-old son Teddy from a previous relationship with his ex-girlfriend Megan.
Confirming their baby joy two weeks ago, Jacqueline and Dan said they were "thrilled" to be expecting a child together.
The couple rekindled their romance in June having first dated in September last year.
Dan and Jacqueline have now returned home from their holiday, but while in Egypt, Dan dismissed rumours that the couple had hit a rocky patch.
Splash! star Dan, who will be touring with male stripping group the Dreamboys this month, tweeted at the time (30 August): "Having a nice time in Egypt with @jacquelineMjos. But apparently we don't talk or get on. Don't know where these people get their info."
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