Johnny Depp Engaged To Amber Heard?

Depp (L) and Heard on Saturday. Credit: Getty Images

That is to be determined, but one thing's for sure: his girlfriend Amber Heard, 27, was spotted wearing some bling on her engagement finger Monday night.

Blink and you would have missed it.

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Leaving West Hollywood's Ago restaurant, she was doing everything to hide her hand, a source tells E! News, adding that the actress also waited for the valet driver to open her car door for her, seemingly so that she wouldn't have to expose her hand.But for a moment the ring appeared. (So far, no word from her rep).

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Depp, 50, and Heard, the Rum Diaries stars who were first linked at the beginning of 2012, stepped out together as recently as Saturday, where they took their super private romance public, showing PDA at a star-studded gala.

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Heard was previously in a four-year relationship with ex-girlfriend Tasya van Ree, while Depp had a relationship with Vanessa Paradis, the mother of his two children, for 14 years.