Markle 42, could be seen dancing and smiling in a glamorous gem-encrusted outfit.
However, fans noticed that her husband, 39, who recently gushed of his fondness for electronic music, appeared not too happy as the couple watched the Teenage Dream pop star perform one of her last residency shows at Resorts World Theatre.
One social media video on X - formerly known as Twitter - saw the former Suits actress dancing to the hit song Roar as she clapped her hands to the rhythm.
While Markle was seen boogieing the night away, her husband appeared bored and less energetic.
The Sussexes have been spotted letting their hair down at Beyonce’s Renaissance world tour in California. Photos / X
This weekend, the Duke and Duchess of Sussex were seen taking a private plane to Las Vegas with Cameron Diaz, Benji Madden and Zoe Saldana for a night of dancing along to Katy Perry’s greatest hits.
They were all seen boarding the jet in Santa Barbara, along with Marco Perego, David Katzenberg, Stellina Bickers, and Bumble founder Whitney Wolfe Herd, and were joined by Celine Dion in the VIP area at the gig.