Katie Boulter will play Jodie Burrage in the Nottingham Open final - the first all-British WTA final since 1977.
Boulter beat fellow Briton Heather Watson 6-4 7-5 in a rain-affected first semi-final, before Burrage then defeated France's Alize Cornet 7-5 7-5.
It will be a maiden WTA final for both players, with the position of British number one also on the line.
In the men's competition, Andy Murray faces Portugal's Nuno Borges in the semi-final later on Saturday.
"I was not expecting this coming into this week but I'm very, very happy with my performance," said 24-year-old Burrage.