The pair reportedly met at a New York City high-society event in May, but kept their romance a secret until just this past weekend.
Belle joined New York Jets quarterback Tebow and his family in Jacksonville, Florida just before Hurricane Sandy ravaged much of the East Coast, according to Page Six.
The rumoured couple apparently attended hotspot Latitude 30 together, where an eyewitness spotted them openly canoodling.
"They were very together and affectionate, until some young fans asked to take Tim's picture, when Camilla politely stood aside," the informant revealed.
A separate source added of their relationship: "They first met at the Met Ball in May and have been quietly dating since. It's amazing they've been able to keep it so quiet."
Tebow and Belle have not publicly commented on their romance.
Belle famously dated Joe Jonas from 2008 to 2009 after starring in the Jonas Brothers' 'Lovebug' music video.