Wladimir Klitschko handily won over Bryant Jennings at the Madison Square Garden, but his fiancée Hayden Panettiere easily stole the show while donning an elaborate and expensive blazer from Saint Laurent that hid her post baby body.

The diminutive "Nashville" star sat ringside at the historic stadium in NYC while she cheered on the boxing champ.

Bryant Jennings was clearly overmatched by the 39-year-old who jabbed his way to a unanimous win.

Hayden Panettiere, 25, however was very animated at ringside as she screamed with every punch landed by her fiancé, Wladimir Klitschko.

"The Nashville starlet wore a gaudy black blazer featuring a golden collar and cuffs as she watched the tense match," Daily Mail reported. "Even after Klitschko's win, Hayden was seen triumphantly waving the Ukrainian blue-and-gold flag."

Wladimir Klitschko later posted on Instagram a photo of him unleashing a jab against the challenger. He wrote, "What a fight. Still undisputed heavyweight champion of the world."

One fan commented, "Klitschko fought good but was not at he's best and that's ok after being off for 7 years I think it was a very good comeback. Great he won now he's confidence level goes up. The 12 round was the best for Wlad he almost knocks Bryan out. I like to see that right hand more loose on he's next Fight. 39 Years Old and the conditioning was great. Still has a few more years to Knock guys out."

Hayden Panettiere and Wladimir Klitschko welcomed baby Kaya in December last year, and the "Nashville" star couldn't help but gush about their little one.

"It's fabulous every day," she told Good Morning America. "You hear that the [baby is] healthy and you don't care about yourself anymore. I mean it's the most out-of-body experience where you go, 'I will completely lay myself on the line for my child without even a hesitation.'"