The duchess, patron of the All England Tennis Club, had joined the duke, the club's president, in the Royal Box at Wimbledon for what turned out to be a classic clash and the longest Men's Singles Final in the tournament's history.
But Meghan in particular will probably be hoping to witness a reversal of fortune for her friend Serena - a seven-time Wimbledon victor - who came up short in last year's final.
Romania's Simona Halep poses with the trophy after defeating United States' Serena Williams during the women's singles final match on day twelve of the Wimbledon Tennis Championships in London, Saturday, July 13, 2019.
It is the first time the pair have been seen together on their own in an official capacity since rumours of a huge fallout, including reports that Kate was in tears at Princess Charlotte's bridesmaid dress fitting.
The granddad and keen tennis player was delighted when he discovered that he'd bagged himself the prime spot to watch eight-time Wimbledon champ Roger Federer.
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On her feet, Kate opted for nude shoes with a chunky heel and ankle straps.
The ladies, who watched as Serena Williams faced off against Simona Halep, sat together and applauded throughout.
The Duchess of Sussex and new mom stopped by Wimbledon last week to support her longtime bestie, Williams, and caused a stir when her team requested that she not be photographed. She saw she played unbelievable. It's so good to have people like that just to know. "I came on court and did my best".
"That's all I want to be to her".
The royal engagement will mark one year since Catherine, 37, and Meghan, also 37, made their first joint solo outing at Wimbledon last year.
On Sunday, July 14, Middleton is expected to return to the tournament alongside Prince William for the men's singles finals.