Meghan, who was sitting between Wimbledon patron the Duchess of Cambridge and Gill Brook, the wife of Wimbledon chairman Philip Brook, turned from time to time to speak to Billie Jean King and her partner Kloss.
For their first royal engagement together, Meghan and Kate sat in the royal box on centre court.
Prior to the matches, the pair met with former female tennis champions and chatted with ball girls and boys.
With Duchess Meghan of Sussex and Duchess Kate of Cambridge in the Royal Box for Saturday's women's final at Wimbledon, it was already a star-studded affair on Centre Court.
What just happened in North Korea?
North Korea leader Kim Jong Un inspects Chunghung farm in Samjiyon County an undated photo released by North Korea's Korean Central News Agency on July 10.
Markle, who last attended Wimbledon in 2016 to support her good friend Williams, is back again to cheer the champ on.
While Serena Williams had hoped to win her 8th Wimbledon title, Angelique Kerber managed to hold off the fierce USA star and win the Wimbledon title becoming the first German woman to win since Steffi Graff's 1996 win, according to a CBS News report.
Meghan went nautical for her appearance, pairing a blue-and-white striped shirt with a pair of wide-leg white pants, both by Ralph Lauren.
Meanwhile, Williams makes a triumphant comeback to the London tournament, giving birth and battling subsequent health complications just ten months ago, Fox Sports reports.
You know what's better than one well-dressed duchess having fun in the sun? Two.
She attended Meghan's wedding at Windsor Castle in May with her husband Alexis Ohanian.
Meghan, who married Prince Harry in a magical ceremony in Windsor in May, is a good friend of Williams, who gave birth to her daughter past year.