Agnieszka Radwanska became the first Polish Grand Slam finalist for 73 years at Wimbledon.
The world number three cruised to a 6-3, 6-4 win over Germany's Angelique Kerber.
The 23-year-old will play four-time champion Serena Williams or world number two Victoria Azarenka in Saturday's final.
It was a remarkably composed 70-minute display for her first major semi-final and she could yet leave London as both Wimbledon champion and the new world number one.
She told reporters: "It's always tough against Angie. We are very good friends but of course on court we were both fighting for the final.
"This is what I dreamed of since I was a kid. Everyone wants to reach a Grand Slam final. It is the best two weeks of my career."
Radwanska took the title of Wimbledon Junior Champion back in 2005.
