AceShowbiz - This just in. Jamie-Lynn Sigler has sparked speculation on her dating co-star Robert Iler after they were seen snuggling up in a Las Vegas nightclub.

Sigler and her on-screen brother Robert Iler were spotted getting cozy at Pure club in the Caesars Palace Hotel last weekend, while out celebrating the final season of their hit TV drama "The Sopranos."

It was TMZ.com that first brought the report to the surface. On the accuracy of the speculation we'll be sure to let you know soon. Just stay tuned.

Sigler and Iler are co-stars on the acclaimed HBO television series "The Sopranos." They play siblings, with the actress portrays the role of Meadow Soprano and the actor plays A.J. Soprano.