The 25-year-old showed she was a doting mum as they took a stroll together yesterday.
Looking ready for autumn, the former EastEnders actress wore a pair of jeans with a camel coloured coat, while three month old Mia was wrapped up against the cold.
The star and her husband Dan, 27, who also share Ella, three, have been inseparable in recent weeks after getting their marriage back on track.
The pair looked loved up at a charity basketball match over the weekend and shared adorable pictures of themselves looking happier than ever.
It comes after Jacqueline and Dan said that their relationship is "stronger than ever" following his recent stint on Celebrity Big Brother.
Dan said told OK! Magazine recently: "It's no secret that we went through a bad patch, but we're back together and things are really good.
"We split up earlier this year but started to get back on track when Mia was born in June and it's better than ever between us now."
Jacqueline added: "Our wedding rings are firmly back on and we're stronger than ever."
She did however admit she found it "hard" to be supportive of Dan while he was on the show because of his closeness to Love Island star Gabby Allen, who he had previously denied having had a fling with.
She said: "I tried to be supportive of Daniel while he was in the house but it was hard when I saw him talking about our problems or spending time with Gabby.
"I know they're just friends but it wasn't nice for me to watch because I knew what everyone would be saying about their relationship."
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