Kevin Costner is apparently rebounding after his split from Christine Baumgartner because he and Jewel are now a thing ... sources with direct knowledge tell TMZ.
These pics were shot on Richard Branson's Necker Island in the British Virgin Islands ... where the 2 of them were part of a tennis fundraiser for the Inspiring Children Foundation. Jewel is the founder of the org, and Kevin was a guest.
Here's what we know.