The announcement follows increasing pressure on Ms Christensen after a string of poor performances by Norfolk's Children's Services.
An Ofsted report into the authority's safeguarding of children in February rated the service as inadequate across the board and branded it "inconsistent and patchy".
And ongoing poor performances at the county's schools led to the first ever local education authority inspection by the watchdog earlier this month to find out what had gone wrong.
More top news
Up to 30 police officers are searching a home in the Norwich area in connection with what's being called a "sensitive investigation."
Ipswich Town recorded a third straight victory in a row with an impressive 2-1 win at Wigan Athletic.
A man dressed in a gimp suit is having his photo taken with people to raise money for a voluntary mental health organisation in Colchester.