"Baby ella osborne was born yesterday. thankyou @DannyO and @Sarabro2 for everything. Amazing. She's perfect x" the pretty brunette wrote after retweeting a message from her boyfriend Daniel Osborne.
The Only Way Is Essex star posted: "So so so so happy to tell you all!! Our baby girl Ella arrived yesterday evening. @jacquelineMjos done SO well, proud of you. I love you."
It seems both Jacqueline's mother Selina, and Dan, were present at the birth yesterday.
The couple have been plagued by split rumours throughout the pregnancy, and at the beginning of the year things seemed to have ended when Dan tweeted: "Relationships just don't seem to work."
He later explained that he was just having a 'temper tantrum,' and that things were back on track for the pair.
Dan already has one child, a son named Teddy, with his ex-girlfriend Megan.
"It’s not easy for Megan… but I’m trying to do the best I can for her, Jacqueline, and of course Teddy. We are trying to work through it all together."
It's unsure whether or not Jacqueline will be participating in the live episodes of EastEnders this week.
Her character, Lauren Branning, has just discovered she is expecting her first child with Peter Beale.
This week, fans of the BBC1 soap will finally discover who murdered Lucy Beale and viewers will watch as the cast film some scenes completely live, with Friday night's entire episode being live.
STORY SOURCE: EXPRESS