Baby joy! Radio 1 DJ Sara Cox shows off her gorgeous new arrival

The star was beaming as she emerged from a London hospital nursing the new arrival, who was carefully bundled up in a yellow blanket and hooded babygrow suit.

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Sara looked a picture of health in a bright red jacket and jeans as she made her way back to her north London home with her precious cargo.

Isaac, her first child with advertising executive Ben Cyzer, was born weighing 7lb 12oz at a London hospital on Monday

She also has a three-year-old daughter, Lola, from her first marriage to DJ Jon Carter.

After spending her twenties as a party-loving "ladette", the 33-year-old has described motherhood as a turning point in her life.

She has said: "I think all my priorities have changed. I appreciate calmness and feeling secure, being looked after.

"I enjoy my role as mum and caretaker of the house. I really relish those roles and I think I'm good at them."

Still, she has no plans of giving up work completely, and is due to return to the air in September.

She has said: "I'd go stir crazy if I didn't work."

"Work and being a mum go quite nicely hand in hand. Each needs the other to keep me sane."

Sara rose to fame as a presenter of late night Channel 4 programme The Girlie Show in 1994.

She acted as Radio 1 breakfast presenter from 2000 to 2003 before moving to the station's weekend lunchtime show.

Annie Mac took over last month when Cox went on maternity leave.