Sophie Dahl pregnant and expecting second child with Jamie Cullum

A new addition to the Dahl family: Sophie reveals that she is pregnant with second child

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UPDATED:

15:09 GMT, 1 November 2012

She's got one of the most famous families in Britain, and now there's going to be a new addition to the Dahl clan.

Model turned author Sophie Dahl, who married jazz musician Jamie Cullum in 2010, has revealed that the couple are expecting their second child.

The 35-year-old cookery writer, who gave birth to her first child in March last year, is clearly working on extending her famous blood line.

Covering up: Sophie Dahl wears a loose-fitting tunic to the Harper's Bazaar party on Wednesday night as she poses with husband Jamie Cullum

Covering up: Sophie Dahl wears a loose-fitting tunic to the Harper's Bazaar party on Wednesday night as she poses with husband Jamie Cullum

Confirmed to MailOnline by her agent, the news comes the day after the loved up pair stepped out for the Harper's Bazaar award at Claridge's in Mayfair.

The granddaughter of writer Roald Dahl wore a loose-fitting patterned tunic to the party, sparking speculation that she might have something to hide.

Posing alongside her diminutive husband, Sophie couldn't seem to keep the smile off her face on the red carpet as Jamie put a protective arm around her waist.

Not a hint: Sophie with Heston Blumenthal in September, showing off sign no of her pregnancy

Not a hint: Sophie with Heston Blumenthal in September, showing off no sign of her pregnancy

Paired with black tights and flat shoes, the star looked demure compared to many of the other guests.

The blonde presenter, who lives in a small village in Buckinghamshire with her husband and daughter Lyra, took a break from modelling to concentrate on her BBC2 cookery programme and her writing but has recently announced her return to the career that made her name.

Although the star is the new face of the Aubin & Wills' new autumn campaign, she may have to give modelling more of a back seat with another little one on the way.

The writer, who has spoken out about size zero models, has maintained her slim figure in recent years and showed off her flat stomach just last month.

Posing at the GQ Awards, Sophie didn't display any sign of pregnancy in a skin-tight red dress.

The blonde writer, who is eight inches taller than her musician husband, married Jamie in a lavish ceremony in 2010.