Hayden Panettiere cheers boxer fiancé Wladimir Klitschko to victory at NYC boxing match

Hayden Panettiere cheered her fiancé Wladimir Klitschko to victory ringside at Madison Square Garden in Manhattan Sunday.

The Ukrainian 39-year-old retained his world championship crown after unanimously defeating 30-year-old Bryant Jennings.

The 25-year-old ingénue animatedly hooted and hollared as her 6ft6in beau pummelled the former handyman, who just began boxing six years ago.

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Go baby! Hayden Panettiere cheered her fiancé Wladimir Klitschko to victory ringside at Madison Square Garden in Manhattan Sunday

Go baby! Hayden Panettiere cheered her fiancé Wladimir Klitschko to victory ringside at Madison Square Garden in Manhattan Sunday

I will break you: The Ukrainian 39-year-old retained his world championship crown after unanimously defeating 30-year-old Bryant Jennings

I will break you: The Ukrainian 39-year-old retained his world championship crown after unanimously defeating 30-year-old Bryant Jennings

The Nashville starlet wore a gaudy black blazer featuring a golden collar and cuffs as she watched the tense match.

'What a fight. Still undisputed heavyweight champion of the world!' Wladimir tweeted to his 196K followers.

Even after Klitschko's win, Hayden was seen triumphantly waving the Ukrainian blue-and-gold flag. 

Pulling faces: The 25-year-old ingénue animatedly hooted and hollared as her 6ft6in beau pummelled the former handyman, who just began boxing six years ago
Pulling faces: The 25-year-old ingénue animatedly hooted and hollared as her 6ft6in beau pummelled the former handyman, who just began boxing six years ago

Pulling faces: The 25-year-old ingénue animatedly hooted and hollared as her 6ft6in beau pummelled the former handyman, who just began boxing six years ago

Yikes! The Nashville starlet wore a gaudy black blazer featuring agolden collar and cuffs as she watched the tense match

Yikes! The Nashville starlet wore a gaudy black blazer featuring agolden collar and cuffs as she watched the tense match

Go for gold in Hayden's Saint Laurent blazer

She was supporting her fiancé Wladimir Klitschko in the boxing ring, but we’re cheering on Hayden Panettiere’s style on the sidelines.

The flaxen-haired beauty made quite the sartorial statement in a longline blazer by Saint Laurent which featured large metallic gold lapels and cuffs, helping her get spotted pretty easily in the chaotic crowd. It’s not a blazer to go unnoticed!

From the French fashion house’s spring/summer 2015 collection where a military motif was embraced throughout, this blazer certainly has something soldierly and regal about it, and it’s available to buy on Net A Porter if you feel like marching to the top of the style stakes.

So make it yours now or check out the edit below for black and gold blazers on a smaller budget. We're loving the Luxe Life blazer on Nasty Gal for a now reduced $54.60, or Stella McCartney's snakeskin and black version if we're willing to have a splurge for $862.

* PRICES MAY NOT BE AS ADVERTISED

Next up, Tyson Fury! Wladimir tweeted to his 196K followers, 'What a fight. Still undisputed heavyweight champion of the world!'

Next up, Tyson Fury! Wladimir tweeted to his 196K followers, 'What a fight. Still undisputed heavyweight champion of the world!'

Victorious: Even after Klitschko's win, Hayden was seen triumphantly waving the Ukrainian blue-and-gold flag

Victorious: Even after Klitschko's win, Hayden was seen triumphantly waving the Ukrainian blue-and-gold flag

The two-time Golden Globe nominee has had some practice, having played indestructible cheerleader Claire Bennet on NBC's Heroes from 2006-2010.

The on/off couple of six years welcomed their first child, daughter Kaya Evdokia, on December 9. 

'It's fabulous every day,' the mother-of-one gushed on Good Morning America last week. 

Save the cheerleader, save the world: The two-time Golden Globe nominee has had some practice, having played indestructible cheerleader Claire Bennet on NBC's Heroes from 2006-2010

Save the cheerleader, save the world: The two-time Golden Globe nominee has had some practice, having played indestructible cheerleader Claire Bennet on NBC's Heroes from 2006-2010

'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."'

When she wasn't watching prizefighters, Panettiere cosied up to 27-time Grammy winner Quincy Jones.

The leggy blonde was very affectionate with the 82-year-old hitmaker, who's fronting the spring 2015 campaign for Buscemi. 

'I will completely lay myself on the line for my child without even a hesitation': The on/off couple of six years welcomed their first child, daughter Kaya Evdokia, on December 9 

'I will completely lay myself on the line for my child without even a hesitation': The on/off couple of six years welcomed their first child, daughter Kaya Evdokia, on December 9 

'Happy to be in ‪#‎NewYork‬ supporting my brother Wladimir Klitschko,' Quincy tweeted to his 494K followers.

Hayden even gave the We Are the World producer - whose daughter is Rashida Jones - a peck on the cheek.

The 5ft New Yorker can currently be seen as Juliette Barnes in the third season of Nashville, airing Wednesdays through May 13 on ABC.  

Leggy lady: When she wasn't watching prizefighters, Panettiere cosied up to 27-time Grammy winner Quincy Jones

Leggy lady: When she wasn't watching prizefighters, Panettiere cosied up to 27-time Grammy winner Quincy Jones

Clearly close: The leggy blonde was very affectionate with the 82-year-oldhitmaker, who's fronting the spring 2015 campaign for Buscemi
Clearly close: The leggy blonde was very affectionate with the 82-year-oldhitmaker, who's fronting the spring 2015 campaign for Buscemi

Clearly close: The leggy blonde was very affectionate with the 82-year-oldhitmaker, who's fronting the spring 2015 campaign for Buscemi

Quincy tweeted to his 494K followers: 'Happy to be in ‪#‎NewYork‬ supporting my brother @Klitschko'

Quincy tweeted to his 494K followers: 'Happy to be in ‪#‎NewYork‬ supporting my brother @Klitschko'

Affectionate: Hayden even gave the We Are the World producer - whose daughter is Rashida Jones - a peck on the cheek

Affectionate: Hayden even gave the We Are the World producer - whose daughter is Rashida Jones - a peck on the cheek

'[Juliette] is just finding herself,' Panettiere told GMA.

'As you know, as a mother, you feel like you lose yourself for a second - which you should - and you're giving yourself and dedicating yourself to another person. But she is terrified that she is going to disappear. All the work that she's done throughout the years - that's her identity - that's what she identifies with.'

Hayden will next play a teenager called Sam in the cabin-in-the-woods horror game Until Dawn, which should be available for PlayStation 4 on June 24. 

Sony Computer Entertainment captured her essence through motion capture technology.

'Postpartum pistol': The 5ft New Yorker can currently be seen as Juliette Barnes in the third season of Nashville, airing Wednesdays through May 13 on ABC

'Postpartum pistol': The 5ft New Yorker can currently be seen as Juliette Barnes in the third season of Nashville, airing Wednesdays through May 13 on ABC

Realistic! Hayden will next play a teenager called Sam in the cabin-in-the-woods horror game Until Dawn, which should be available for PlayStation 4 on June 24

Realistic! Hayden will next play a teenager called Sam in the cabin-in-the-woods horror game Until Dawn, which should be available for PlayStation 4 on June 24

'Shooting a video game can come with a price': Sony Computer Entertainment captured her essence through motion capture technology

'Shooting a video game can come with a price': Sony Computer Entertainment captured her essence through motion capture technology

Also spotted ringside at Madison Square Garden was Vice action star Bruce Willis rocking his Yankees cap.

The 60-year-old Golden Globe winner put up his dukes for the cameras and later made it on to the stadium's Megatron.

The Sin City star was joined by his wife Emma Heming, with whom he has two daughters - Mabel, 3, and Evelyn, who turns 1 next month.

Watching the fight: Also spotted ringside at Madison Square Garden was Vice action star Bruce Willis rocking his Yankees cap

Watching the fight: Also spotted ringside at Madison Square Garden was Vice action star Bruce Willis rocking his Yankees cap

'Oh my god! Look honey, you're on the Megatron!' The 60-year-old Golden Globe winner put up his dukes for the cameras and later made it on to the stadium's Megatron

'Oh my god! Look honey, you're on the Megatron!' The 60-year-old Golden Globe winner put up his dukes for the cameras and later made it on to the stadium's Megatron

Date night! The Sin City star was joined by his wife Emma Heming, with whom he has two daughters - Mabel, 3, and Evelyn, who turns 1 next month

Date night! The Sin City star was joined by his wife Emma Heming, with whom he has two daughters - Mabel, 3, and Evelyn, who turns 1 next month

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