While there's no confirmation yet on whether that stunner means Shayk and Bradley Cooper are heading down the aisle, we can still ogle over her gorgeous ring. The 30-year-old stepped out in L.A. on Wednesday wearing a Sea New York cat-print dress, Givenchy shades ($295; saksfifthavenue.com), and perhaps the most noticeable accessory of all—an oval-shaped emerald with a diamond halo that looks very similar to Kate Middleton's royal engagement ring. Swap out that green stone for a sapphire and you'd basically have yourself a carbon copy.
Reps for the star couple have not commented, according to People. While we await further news about these first-time parents' potential wedding plans, we'll be here fantasizing about what Shayk could wear down the aisle. If her Victoria's Secret runway look was any indication, we're thinking this mom-to-be could be brave enough to wear lace, sheer, or even cutouts on her wedding day.
VIDEO: Celebrity Engagement Rings
In the meantime, click through to our gallery to see all of Hollywood's most stunning engagement rings.