The Scottish Championship side booked their place in the final with a penalty shootout win over Celtic.
Former Rangers player and manager Graeme Souness has claimed that Mark Warburton's side's performance in the Scottish Cup semi-final last weekend was one of the most dominant displays he has seen in an Old Firm game, The Scottish Sun reports.
The Gers twice took the lead against Celtic but ultimately needed a penalty shootout to get past the Scottish Premiership side. Nevertheless, Souness has stated that it was one of the most impressive displays that he has seen in games between the two great rivals.
"I thought Rangers were fabulous against Celtic last week," he told The Scottish Sun.
"When I think back to when I was involved in Old Firm games at the club I can't remember any game between the clubs when one team was as dominant as that."
Although the game went all the way to the lottery of spot-kicks, it is surely fair to say that the Light Blues dictated most of the contest and ultimately deserved to progress to the final.
Their high-pressing style was in complete contrast with how Ronny Deila's men seemed to play for most of the game, and perhaps that surprise was exactly why the Scottish Championship side were ultimately able to spring a surprise.
And while calling it one of the most dominant displays may seem a bit extreme - considering that they could not be separated after 120 minutes - Rangers' performance will give Warburton a huge amount of confidence ahead of their return to the top flight next season.