Top seed and World No 1 Serena Williams reached her first French Open final for over a decade after hammering last year's runner-up Sara Errani in straight sets.
The 15-time Grand Slam champion, who won her only Roland Garros title in 2002, came through 6-0 6-1 in just 46 minutes to reach her 20th major final.
Williams will face defending champion Maria Sharapova in Saturday's final at Roland Garros.
She started like a steam train bludgeoning her way to a 'bagel' opening set against the 5ft 4 1/2in Italian world No 5, hitting 18 winners in just 21 minutes of action.
The American was at the top of her game, finding the lines with perfect length, producing drop shots when required, slices and powerful groundstrokes to throw her opponent behind the baseline in a one-sided performance.
Williams, who is the first American woman to reach the French Open semi-finals since Jennifer Capriati in 2004, was hitting 125mph with her first serves.
Errani won only eight points in the first set, and had managed just 10 when Williams moved 3-0 up in the second.
The 26-year-old managed to hold in the fourth game to avoid the whitewash, raising her arms aloft to the delight of the Parisian crowd on Court Philippe Chatrier.
And it was soon over as she ended Errani's dreams of a second successive final with an ace down the middle, dropping just 18 points to end a quite extraordinary display of tennis.
Williams' win takes her career-best winning streak to 30, the third longest since 2000 behind sister Venus (35) and Justine Henin (32).
She has lost just three of her last 76 matches dating back to a shock first-round exit in Paris last year as well as remaining undefeated on clay this year.
"I told myself: 'Serena, just concentrate' and that's what I did," said Williams, who had been pushed to three sets and almost two hours by quarter-final opponent Svetlana Kuznetsova.
"Against Maria (Sharapova), I will have to prepare slightly differently. She's a great player. But it's magnificent to be back in the final after 11 years."