Associated Press
| October 21, 2014

There’s something different about Renée Zellweger — and it has nothing to do with gaining weight for another “Bridget Jones” revival.

READ: Renée Zellweger is Almost Unrecognizable These Days

All eyes were on the 45-year-old actress at Monday evening's Elle Women in Hollywood Awards at the Four Seasons Hotel in Los Angeles — but perhaps for the wrong reasons: Zellweger was definitely missing her signature squint and permanently pursed lips.

What happened?

Back in 2013, the Oscar-winning actress stirred headlines for her dramatic transformation, which the Daily Mail characterized as a “deer-caught-in-the-headlights gaze.”

PHOTOS: 10 Celebrities That Look Way Older Than They Actually Are

There are several reasons why Zellweger, who E! Online describes as “one of the highest-paid actresses in Hollywood just years ago,” looks different these days. 

Several media outlets, like The Huffington Post UK and gossip blogger Perez Hilton hinted that maybe she had a little work done. Anthony Youn, M.D., who hasn’t personally treated the star, told Radar he suspected the same.

“It appears that she may have undergone injections of Botox, preventing her brows and forehead from creating her trademark look,” says Youn. “Her brows look more relaxed, allowing her eyes to open up more.”

READ: The Truth About Botox

While Zellweger has never openly admitted to getting surgery, Express UK reports that several life changes, such as “a dramatic weight loss and an embarrassingly short wedding to country singer Kenny Chesne,y” did have an impact on her life, which could have prompted a makeover of sorts. 

It could also just be the aging process at work.

You be the judge. See Zellweger’s many looks from over the years below, then take our poll on how far you'd go to avoid aging.

Reuters
1998

Attending the premiere of "One True Thing" in New York.

Reuters
1999

Arriving at the 71st Annual Academy awards in Los Angeles.

Reuters
2000

Arriving as a guest for the 10th annual Fire & Ice Ball in Beverly Hills.

Reuters
2001

Arriving for the 73rd annual Academy Awards in Los Angeles.

Reuters
2002

Arriving at the 74th annual Academy Awards in Hollywood.

Reuters
2003

Attending the 75th Annual Academy Awards in Hollywood.

Reuters
2004

Posing with her Golden Globe award in Beverly Hills.

Reuters
2005

Arriving for the premiere of "Cinderella Man" in Los Angeles.

Reuters
2006

Arriving at the BAFTA (British Academy of Film and Television Arts) awards in London.

Reuters
2007

Participating in the TV show "Wetten Dass" with singer Kylie Minogue in Graz.

Reuters
2008

Listening during a news conference for the film "Appaloosa" at the 33rd Toronto International Film Festival.

Reuters
2009

Arriving at the 66th annual Golden Globe awards in Beverly Hills.

Reuters
2010

Attending "CNN Heroes: An All-Star Tribute" in Los Angeles.

Reuters
2011

Posing on the red carpet at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the exhibition "Alexander McQueen: Savage Beauty" in New York.

Reuters
2012

Arriving at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the "Schiaparelli and Prada: Impossible Conversations" exhibition in New York.

Associated Press
2013

Attending Giorgio Armani's "One Night Only New York” fashion show.

Associated Press
2014

At the UCSF Medical Center event in San Francisco.

AP
2014

At Elle's annual Women in Hollywood Awards.