Julianna MarguliesFormer ER star Julianna Margulies has given birth to a baby boy.

Julianna married fiance Keith Lieberthal in November before giving birth to their son Kieran Lindsay Lieberthal last week. I have to say, he is cuter than any other baby I’ve seen.”

Keith’s father confirmed the news, telling People magazine: “Obviously I’m utterly delighted to be a grandfather.

Julianna’s mum Francesca was also full of praise for the child, describing Kieran as “beautiful”.

Her dad Paul added: “He has some of Keith’s features and some of Julianna’s features. He’s brought a lot of joy to the family.”