Celtic's treble hopes remain alive after Jota's header ended Rangers' Scottish Cup defence and any chance of silverware this season.
The Portuguese winger made the most of a defensive error to head Ange Postecoglou's side ahead in the 42nd minute of a tense Old Firm semi-final at Hampden Park.
Alfredo Morelos, James Tavernier, Fashion Sakala and Rabbi Matondo all had chances to pull Rangers level but they could not find a way through the Celtic defence.
Celtic will now face Inverness Caledonian Thistle in the final on June 3 with the chance of clinching another domestic treble.
With the Hoops just three points from retaining the title, Rangers are all but guaranteed to end the season without a trophy.
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