This is her first time out after she was forced to self-quarantine after contact with a Covid-19 patient.
Also participating in the competition was Hollywood star Tom Cruise, who was with actress Hayley Atwell.
This is the first time two finalists have met in a women’s competition since 1977 (the year Virginia Wade won the championship).
Despite the unstable weather, the roof of the Centre Court was still open, and the royal couple chatted with former Wimbledon champion Billie Jean King sitting behind them.
In the royal box a few rows behind the couple, the actor Priyanka Chopra is a friend of their sister-in-law, the Duchess of Sussex.
Tomorrow’s men’s singles final and the confrontation between England and Italy in the Euro 2020 final at Wembley are the beginning of the sports event weekend.
After completing a period of self-isolation, the Duchess will also participate in the men’s competition, even without her husband.
Kensington Palace said her self-isolation period ended on Saturday, but did not confirm when it will officially end.
On July 2, the Duchess began self-isolation on July 2 after receiving a notice that she had contacted someone who later tested positive, but it is not known whether the NHS application made her aware of this.
That day she visited Wimbledon, visited the SW19 Tennis Club, met the staff at the venue, and watched the doubles match of British Jamie Murray.
Kate is an avid tennis fan and patron of the All England Lawn Tennis Club. Since she married William in 2011, she has often participated in the Wimbledon Championships.
Last week, she watched England’s victory over Germany at Euro 2020 at Wembley with Prince William and their son Prince George.
William and Kate followed the royal family’s coronavirus testing system, conducting lateral flow testing twice a week, and conducting additional testing before public events such as sports events.