While most well-wishers send a card or flowers to commemorate the arrival of a new baby, superstar Beyoncé used her own corner of the web to offer up her best wishes.
On the 'news' page of her site, Beyonce posted a black and white image of Kim and Kanye, with the caption 'Congrats to Kim & Kanye', followed by: 'Congratulations Kim & Kayne, enjoy this beautiful moment together.'
Kim gave birth to her little girl on Sunday night and her celeb pals have been quick to share their delight in the happy news across cyberspace.
Hip Hop mogul Russell Simmons tweeted: "There is no greater gift in life than a child's laughter! congrats to Kim And Kanye", while American TV personality Bethenny Frankel wrote: "It's the most beautiful, best thing that could happen to you. Girls rule."
Usually a prolific tweeter herself, Kim has not yet posted about her new arrival - her last message being a non-baby-related tweet the day she went into hospital.
We wonder how long we'll have to wait for the first twit-pic?