Elizabeth Olsen's Engagement Ring Is The Latest To Join A Hollywood Trend

The 'Avengers' actress and younger sibling of Mary Kate and Ashley Olsen has been spotted wearing her engagement ring for the first time and the rock looks very familiar indeed.

Elizabeth Olsen -- who's set to marry boyfriend turned fiance Robbie Arnett -- flashed her brand new jewellery while out on a trip to the supermarket.

From a glance, it appears to be a round-cut emerald surrounded by a halo of diamonds with a yellow gold band.

Eagle-eyed fans might recognise that the 30-year-old actually debuted the ring from her musician partner last month at Comic Con in San Diego but very sneakily wore it on her right hand and avoided media attention. Genius!

READ MORE: Meghan Markle's Updated Engagement Ring Is Very Similar To The One From Her Past Marriage

While emeralds aren't the first precious gemstones that come to mind when you think of traditional engagement rings, the particular style has been extremely popular with celebs in recent years.

Instead of opting for a diamond as the centre piece, stars including Katy Perry, Heidi Klum and Lady Gaga have been rocking more colourful stones like ruby, sapphire and emerald, surrounded by smaller diamonds.

We copped a very close look at Heidi's ring when she flashed her tickets to see Billie Eilish a few months ago.

Katy Perry showed off her giant ruby surrounded by diamonds when she announced her "full bloom" engagement to Orlando.

And, although the engagement was called off earlier this year, Lady Gaga had this pearler on her left hand throughout her 'A Star Is Born' media appearances.

Getty Images.

We're not sure if the vintage-inspired trend has the power the knock the all-powerful diamond off it's perch when it comes to engagement rings, but we're big fans of Elizabeth's new rock.

Main Photo: Instagram