Ben and Jessica Mulroney have welcomed a little sister for their twin boys with the birth of their first daughter on Wednesday morning.

Ben wasted no time announcing wee Isabel Veronica Mulroney — aka Ivy — to the world via Twitter. "Isabel Veronica Mulroney ("Ivy") was born at 8:33 am and was 5lbs 9oz. She is as beautiful, happy and healthy as mommy who is resting well," he said approximately two minutes after the delivery.

The baby was delivered by Caesarean section, according to a source.

The eTalk host and his fashionista wife got married in 2008 and had their sons Brian (after Ben's dad and the former prime minister) Gerald Alexander and John Benedict Dimitri less than three years ago.

LOOK — Ben, Jessica and Company:

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  • "Even though it's Mother's Day, I feel like it's all about me... #luckiestguyaround cc: @jessicamulroney"

  • "Dear @Disney, your 4 minute preview for #Planes has been viewed 6 times in a row. We love it. Looking fwd to Aug 9th!"

  • "2 of the biggest reasons I get up in the morning are actually quite little."

  • "Family day in MTL!!!"

  • "@jessicamulroney is right: this does look like a promo shot for a reality show (fyi: it isn't)"

  • "Brian and John are ready for Aunt Liz's wedding!"

  • "Harvard? A parent can dream!"

  • "Just girly enough."

  • "it's a #disney kinda night."

  • "Jazzercise Friday"

  • "#movember #toddlermoustache"

  • "Two monkeys won't go to sleep"

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