Peaches Geldof and Thomas Cohen pose for photographers at the Moet & Chandon Etoile Award for Mario Testino at the Park Lane Hotel in London, England, September 19, 2011. (REUTERS/Olivia Harris)

British socialite Peaches Geldof is pregnant with her second child.

Bob Geldof's 23-year-old daughter has announced she is expecting a little boy again - just seven months after she gave birth to first son Astala in April.

The mom-to-be, who married rocker Thomas Cohen in September, has revealed she is planning to name the tot Phaedra.

She tells Britain's Hello! magazine, "It's a name that comes from an ancient Greek play but it also features in a song Tom and I both love called Some Velvet Morning by Lee Hazlewood. Finding out I was pregnant again so soon was quite a shock. Tom was so happy. He loves being a dad so much and is brilliant with Astala, who totally adores him, so he was over the moon."

Geldof admits she had a "momentary panic" when she found out about her second pregnancy, but she is thrilled her family is growing.

She adds, "After Phaedra is born I'm going to be concentrating on the two boys so I don't think I'll be adding to our little brood until later on in my life when I'm older and don't have two toddlers running around demanding all of Tom's and my attention. I may be only 23 and the only one of our friends who's married, got a baby and one on the way... but it's a life I've dreamed of and I couldn't be happier."