Two Grimm stars are getting married in real life!
Bitsie Tulloch and David Giuntoli joined their co-stars at Comic-Con for a Facebook Live chat with ET's Leanne Aguilera, who at the end of the discussion noticed Tulloch wearing a gorgeous rock on THAT finger.
"It's over a hundred years old," Tulloch said of the ring. "The diamond is from the 1890s, and the setting is from 1915, which is the year my grandfather was born."
You have to give credit to Giuntoli, he knows how to pick 'em! Of the classic band, the actor joked, "I had to dig it out of the grave, it's fine..."
Meanwhile, the couple revealed that they've actually been engaged since April.
"We've just been quietly enjoying it," Giuntoli shared.
"We did decide that Comic-Con ... I was going to wear the ring out in public for the first time so," Tulloch explained.
Of course, the fact that their Grimmcharacters, Juliette Silverton and Nick Burkhardt, date on the show is not lost on the happy couple
"My little joke was because we were boyfriend and girlfriend on the show, everything in the marriage will be a tax write off," Giuntoli laughed.
You can watch the ring details unfold in the chat below.
Tullock also tweeted a pic on Saturday, where you can see the ring at a distance.
Congratulations, you two!
NBC's Grimm was renewed for a sixth season in May.
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