A dramatic match saw the Light Blues dominate possession and twice take the lead before being pegged back by their Glasgow neighbours, but in spite of that, they held their nerve in the penalty decider to set up a clash with Hibs in the May 21 final.
When asked to describe the feeling, Holt said: “It was incredible. What a great day for everyone – the team, the fans and the club in general. We’re all delighted to get that outcome and it’s a great feeling.
“I thought we were the better team and thoroughly deserved to win the game. It obviously went to penalties but even there the boys did so well.”
Rangers, as ever were backed by a terrific support as they will be at the final, and Holt insists there will be no-let up in their remaining four league matches before the Hampden showpiece game.
He continued: “The support was unbelievable, and we’ve had that the whole season. The boys really thrive off it.
“Our character and work ethic and team ethic has been there all season. We proved that again when Celtic came back into the game twice, but we kept going and got our rewards.
“We have games left in the league, but we will look forward to the final and be fully prepared for it when it comes around.”