Prince Harry and Meghan Markle have a film star moment in the rain at Endeavour Awards

Prince Harry and Meghan Markle have perfectly illustrated the power of a photograph.

On Thursday night, the Duke and Duchess of Sussex attended their first joint, public engagement since announcing they are to step down as senior members of the Royal Family on 31 March.

The pair attended the Endeavour Fund Awards at Mansion House in London, co-ordinating in blue ensembles.

Read more: Meghan Markle's Vogue cover inspires Forces for Change event

But it wasn’t just their sartorial prowess that won over fans: a photo showing Harry shielding Meghan from the rain under an large umbrella quickly became a talking point on social media.

Fans couldn't get enough of this stunning image of the Duke and Duchess of Sussex. (Getty Images)
Meghan beamed as she returned to the UK for her first public appearance since announcing the couple were stepping down from royal duties. (Getty Images)
The image has been praised online. (Getty Images)

From the colour pop of Meghan’s Victoria Beckham form-fitting, turquoise dress to the sweet gaze they shared, the picture seemed to be sprinkled with a little bit of magic.

The couple may have had a little trepidation about the reception they might receive from the British public, following the fall-out of their bombshell announcement, but they needn’t have worried.

Dozens of well wishers had braved the bad weather to catch a glimpse of the couple, and cries of “we love you Harry and Meghan” rang out (with just a single boo), which caused a beaming duchess to turn and wave.

The couple looked relaxed and happy. (Getty Images)

And the love continued online, with people heading to social media to fawn over the iconic photograph.

On Twitter, fans have 'liked' and 'retweeted' the photographs hundreds of times, comparing the snapshot to earlier snaps of the couple sharing an umbrella.

Read more: Will losing Sussex Royal impact Harry and Meghan's brand power?

Read more: The 360: Does it matter if Meghan and Harry are gone for good?

Next week, Harry and Meghan will carry out what is expected to be their last official appearance alongside other senior royals including the Queen, Harry's father, Prince Charles, his brother Prince William and the Duchess of Cambridge at the annual Commonwealth Service at London's Westminster Abbey.

It’s thought Harry and Meghan’s son, Archie, isn’t in the UK with the couple.