Serena and Venus Williams reached the women's doubles final at Wimbledon with a straight-set victory over Julia Goerges and Karolina Pliskova.
The unseeded American duo, who have won five Wimbledon doubles titles, triumphed 7-6 (7-3) 6-4 on Court One.
They will play Hungary's Timea Babos and Yaroslava Shvedova of Kazakhstan in Saturday's final.
Serena Williams will also play in the women's singles final on Saturday, against Germany's Angelique Kerber.
Serena, 34, and 36-year-old Venus last took the Wimbledon doubles title in 2012 and have won 13 Grand Slam doubles events.
They also won Olympic gold in the doubles in 2000, 2008 and 2012.
Fifth seeds Babos and Shvedova won 6-4 6-2 against American pair Abigail Spears and Raquel Atawo.
Elsewhere, Britain's Heather Watson moved into the semi-finals of the mixed doubles as she and Finland's Henri Kontinen won 6-3 6-2 against American Scott Lipsky and Alla Kudryavtseva of Russia.
Watson and Kontinen play Austria's Oliver Marach and Jelena Ostapenko of Latvia in the last four.