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Hayden Panettiere

Slaven Vlasic/Getty Images

Nashville star Hayden Panettiere showed off a massive diamond ring at the ABC Upfronts in New York on Tuesday.

And while engagement rumors swirl around the 23-year-old, the ring does appear to be on the right hand and not her left ring finger.

Panettiere looked sexier than ever in an eggplant purple bandage dress with strappy cutouts on one shoulder.

The actress paired the frock with black ankle boots and a side-swept braid.

She and boxer boyfriend Wladimir Klitschko were spotted back together (with some major PDA!) in January after ending their two-year relationship in May 2011.

Secretly engaged or not, the ring's gorgeous, girl!