05/08/2013 11:49 EDT

What Boob Job? Hayden Panettiere Covers Up In Halterneck Dress (PHOTOS)

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NEW YORK, NY - MAY 07: Hayden Panettiere attends the 34th Annual Sports Emmy Awards at Frederick P. Rose Hall, Jazz at Lincoln Center on May 7, 2013 in New York City. (Photo by Marc Bryan-Brown/WireImage)

After rumours of a boob job swirled when "Nashville" star Hayden Panettiere was spotted in a tiny bikini in April, the actress decided to cover up her assets at the Sports Emmy Awards Reception in New York on Tuesday.

Standing beside her 6'6 tall boxer boyfriend, Wladimir Klitschko, the pint-size former "Heroes" star (who stands at only 5'0 tall) kept us guessing as to whether she has gone under the knife.

Wearing a silver halterneck dress, the 23-year-old blond beauty looked happy to be on the arm of the towering Klitschko. With her hair swept to the side in loose waves, Hayden struck a glamorous pose à la Juliette Barnes, the diva country singer Hayden plays on the hit TV show "Nashville."

It's no wonder that Panettiere is looking so happy; after a year-long breakup, Hayden and Wladimir reconciled in April and have sparked rumours that they might be engaged.

Boob job or no boob job, Hayden looks gorgeous.

See Hayden's many red carpet looks:

Photo gallery Hayden Panettiere's Style See Gallery