Pop star Jennifer Lopez and dancer Casper Smart continue to fuel speculations that they are back together.

The couple was spotted holding hands while taking a stroll on the set of her new drama "Shades of Blue", reported Ace Showbiz.

In some photos, Lopez and Smart looked relaxed as they walked hand-in-hand on the Brooklyn set.

The star of "The Boy Next Door" wore a green puffy long coat and navy boots with her hair styled in voluminous curls.

Smart, meanwhile, donned a jean jacket, a white tee, chambray trousers and brown shoes.

Lopez, 45, and Smart have been spotted spending time together since January.