Peaches Geldof is expecting her second child with rocker husband Tom Cohen.

The 23-year-old, who already has seven-month-old son Astala, is expecting another baby boy but admitted she is nervous about becoming a mother again so soon.

Speaking to HELLO! magazine, Peaches, who is into her fourth month of pregnancy said: ''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.

''I, on the other hand, did have a momentary panic and go, 'Oh my god, we're going to have a one-year-old and a one-month old! How will we cope?' ''

She added: ''There are massive benefits to having two children so close together. Astala's such a happy, sociable little boy, I think he will adore having a sibling... As much as I would love to have a daughter one day, I am thrilled Astala will have a brother. They can share clothes and toys and do boy stuff together.''

Peaches plans to name her son Phaedra, and she explained: ''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.''