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Ryan Gosling, Eva Mendes, The Place Beyond the Pines

Dave Allocca/Startraksphoto.com

Let's start with the facts: Eva Mendes and Ryan Gosling have been together since September 2011. The two have a daughter, Esmerelda. But are they also secretly engaged?!

The 41-year-old actress has been wearing a gorgeous emerald bauble for some time, leading to speculation that her longtime beau may have popped the question. 

Mendes is sporting the stunning accessory in one of her recent Instagram pics, so E! News did a little digging to find out when she first started rocking the eye-catching jewelry piece. 

The Place Beyond the Pines star appears to be sporting the ring in a pic uploaded to her Instagram account 12 weeks ago. She seems to have begun wearing the bauble sometime in June, consistently on her right hand, and was also sporting the ring during her red carpet appearance last month at an Estée Lauder event. 

Eva Mendes

Olivia Salazar/FilmMagic

Our best guess? The ring was a push present from Ryan to mark the birth of their daughter (emerald...Esmeralda...get it?). A rep for Mendes declined to comment on questions about her private life. 

Speculation aside, Mendes is a loving motherhood and her daughter, whom she welcomed in fall 2014, will soon celebrate her first birthday. 

While the notoriously private couple rarely discusses their romantic life, Mendes wrote in a recent Instagram post that Gosling's dog George is "so sweet with" their baby girl. 

Eva Mendes Instagram

Instagram

Likewise, Gosling added in March of parenthood, "It's just an exciting time."

Daily Mail was first to report the engagement speculation. 

Spill the beans, you two! 

PHOTOS: Ryan Gosling & Eva Mendes' romance rewind