Sara Cox to fill in for Fearne Cotton on Radio 1 show
Sara Cox will fill in for Fearne Cotton on Radio 1 while the DJ is away on maternity leave.
The 30-year-old announced the news that she was expecting her first child with Jesse Wood on her official blog.
On Twitter Radio 1 said: "We have news! We can confirm that the wonderful @sarajcox will be filling in for Fearne when she goes on maternity!"
Sara Cox presents a Radio 1 show on Sunday mornings and was the breakfast show host between 2000 and 2003.
The 37-year-old was replaced by Chris Moyles, who hosts his final breakfast show on 14 September.
Fearne Cotton has not revealed how far into her pregnancy she is.
At the beginning of her Radio 1 show on Thursday (9 August) she said: "I'm over the moon. I'm very happy.
"I sighed a big sigh of relief now I'm able to tell people. I was really overwhelmed with all the messages yesterday."
Fearne Cotton has presented the late morning show on Radio 1 between 10am-12.45pm since taking over from Jo Whiley in September 2009.