Kerber, a two-time Grand Slam champion, is playing in her first major final since her triumph at the 2016 U.S. Open.
In the semifinals it was smooth sailing for Kerber who downed Jelena Ostapenko in straight sets to reach her second Wimbledon finals, her first since 2016.
This will be Williams attempt at bagging a 24th grand slam title at the All England Lawn Tennis Club in Wimbledon, England so she'll no doubt be thrilled to have her friend cheering Centre Court-side.
The 36 year-old American was stopped in her tracks by a brilliantly composed performance from Germany's No 11 seed, who prevailed 6-3 6-3 in an hour and five minutes.
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It was a contrast of styles, with Kerber showing brilliant defensive resolve to counteract Williams' risky firepower - though the 30-year-old's serve has improved dramatically this year, too.
Despite the higher level of her opponents, the German had dropped the same number of sets as Williams. I'm really happy for Angelique, it's unbelievable, ' said Williams. That much was clear at their wedding, where guests like Victoria Beckham, Oprah, and the royals mingled together, but it was also clear on Saturday, when Markle and her sister-in-law Kate Middleton went to Wimbledon.
Serena made light work of Julia Goerges in the semi-final 6-2, 6-4 and is starting as the favourite to add to her tally of 23 Grand Slam titles in what will be her 10th Wimbledon final. She gave her conqueror the warmest of hugs, looked up to her box and smiled. Then came her singles return, at Indiana Wells in March, when she won her first two matches before losing to her sibling.
"I see a champion", Kerber said, "that's for sure". Just getting this far after all she has been through over the past couple of years was a considerable achievement.