The So You Think You Can Dance host was born October 23, 1976, in Birmingham, England.
After making it to the finals of a British modeling competition at age 14, Deeley’s career in front of the camera took off. After modeling in Europe for several years, she was offered a job as a host on Britain's MTV and CD:UK. In 2006, she began her gig hosting FOX's reality TV dance competition.
Deeley married advertising executive Mark Whelan in 2001, though their marriage ended five years later. She is currently married to Patrick Kielty.