Could these photos signify the Hollywood stars have made things official and there's a Hey Girl wedding on the cards?
Mendes has been spotted wearing a huge ring on her finger pretty much daily for the past few weeks.
Ok, so it's on her right hand and it's not a diamond, but could the 41-year-old actress just be trying to put us all off the scent?
She and Gosling are famously private about their relationship, even keeping schtum about their pregnancy until a few weeks before the due date.
And In Style has suggested Mendes' green emerald ring could actually be a sentimental reference to the couple's 11-month daughter Esmerelda.
We may not know if it's officially an engagement ring, but we do reckon it's a very special piece of jewellery as she's been snapped with it so many times.
Only time will tell...