The newest member of the team arrived on Sunday as Kevin announced on Instagram. The sportsman shared a picture of his daughter's feet on Instagram, with his hands cupped around her toes in a heart shape. He had written: "Welcome to the world to our beautiful little girl, Rosie!"
Kevin Pietersen and pop star wife Jessica now have a little girl
Former Liberty Xsinger Jessica also tweeted: "The newest addition to our family, beautiful Rosie, arrived safely into the world yesterday. We couldn't be happier or more in love xxx".
Kevin only revealed that his wife was expecting last month when he shared their good news during an interview with Piers Morgan.
The happy couple, both 35, married in 2007 in a winter-wonderland themed wedding with Darren Gough as Kevin's best man.
Since 2008 when Brit award-winning group Liberty X split up, Jessica has largely stayed out of the limelight and concentrated on family life.
In 2010 when Jessica went into labour with Dylan, her husband was playing in a tournament in Barbados. He had to hop on a plane and race more than 4,000 miles to be there as his son was born.
This time the cricket legend also made sure he was on hand for the big arrival, tweeting last week:"#London #Home #BabyTime. Have a great Christmas & I'll see you in the New Year!"