Peaches Geldof has revealed her father Bob cannot wait for the birth of her son so there will finally be a boy in the family.
Speaking at the Temperley show at London Fashion Week, Geldof said she chose the name Astala Dylan for the baby because of her fiance Thomas Cohen.
She said: "I wanted a Jewish name because my fiance is a Jew and the name is the male version of Esther. We found it in a name book and liked it."
The socialite, who is due to give birth in two months, added: "I love being pregnant, my fiance has to cook for me, I'm so exhausted all the time but I love it."
She said her father, charity campaigner Bob Geldof, cannot wait for the birth.
"He's happy there is going to be a boy in the family, there will finally be an heir to the throne of Geldof. My father is so ecstatic, if this was medieval England I would be in the money."
She added: "I think having a baby will be a positive change in my life, we have a house and dog now."
Speaking about the designer, Geldof said: "I've been wearing Temperley a lot because it fits me. I can't wear anything with zips and constraints at the moment. When I'm at home I'm just in Primark pyjamas though, not very glamorous."
In September Pippa Middleton prompted a flurry of flashbulbs when she graced the front row of the Temperley show.
Geldof said the Duchess of Cambridge and her sister had changed British fashion. She said: "They have proved you can be conservative and sexy, it's Sloaney couture and I like that. I like the Sloane ranger look."