Chris Martin engaged to Annabelle Wallis?

Chris Martin could be set to wed again.

The Coldplay rocker recently finalised his divorce from Gwyneth Paltrow and just days later, his new girlfriend Annabelle Wallis sparked speculation they’re engaged by showing off a huge diamond ring on her wedding finger.

The 31-year-old actress posted a selfie onto her Instagram account as she got ready to attend a wedding but fans were quick to spot the sparkler on her left hand.

One said: "Look at that big ring on her wedding finger", while another said: "That definitely looks like an engagement ring, I hope it is!"

Chris, 39, and Annabelle started dating in March and are said to be smitten with each other.

The speculation comes just days after Chris and Gwyneth’s divorce was officially announced.

The former couple, who famously announced their "conscious uncoupling" two years ago, reached a divorce settlement in May and their judgement was entered at a Los Angeles County court.

The couple first announced their plan to end their decade-long marriage in March 2014.

Since then, Chris and the ‘Iron Man’ actress have remained close, holidaying with their two children – Apple, 12, and 10-year-old Moses – and socialising at other family gatherings.

Gwyneth – who is now in a relationship with Brad Falchuk – recently spoke about how the couple have always put their children first, although she admitted the split hasn’t always been easy.

The 43-year-old beauty said: "As anybody who has been divorced knows, you have to put a lot aside to maintain the family and the practicalities of what that might mean and sometimes that’s quite tough on a personal level."