Palladium‐catalyzed stereoselective olefinic C–H alkynylation of gem‐diarylsubstituted ethylenes with propargylic alcohols was achieved to access diverse unsymmetrical 1,3‐enynes. The regio‐ and stereoselectivities were established through a 1,4‐palladium migration from aryl to vinyl in the presence of 2‐FC<sub>6</sub>H<sub>4</sub>OH additive. Mechanistic investigations have suggested that cleavage of the olefinic C–H bond might not be involved in the rate‐determining step throughout the catalytic process.