Meghan, 37, accentuated her growing baby bump in an outfit designed by Safiyaa.
The two piece featured a halter top covered in black sequins with a leaf pattern, perfectly hugging her bump.
She pulled her hair back into an elegant updo that highlighted her dazzling Birks Snowstorm Earrings, which she has previously worn on several occasions.
Her Prince looked dashing in a classic tuxedo and black bow.
The royal showed his wife the ropes, having attended his first official Royal Variety Performance back in 2015.
This year, the show was hosted by Greg Davies and included performances from Take That, George Ezra, Clean Bandit, the cast of Tina, The Tina Turner Musical and Andrea and Matteo Bocelli.