The 21-year-old is cup-tied so will have to sit out the game against Celtic.
Billy King has admitted that he is gutted that he will be able to play no part in Rangers' Scottish Cup semi-final clash with Celtic later this month, but insisted that he will be cheering Mark Warburton's men on from the sidelines, The Scottish Sun reports.
The winger is on loan with the Scottish Championship leaders from Hearts so is cup-tied for the Hampden Park showdown. And while he suggested that he and Michael O'Halloran - who is also unable to play having joined from St Johnstone during the January transfer window - will be in the stands looking on, he conceded that it is difficult to accept that he will not be playing a part in the game.
"It's unfortunate, but I knew it would happen," he told The Scottish Sun.
"Obviously, Celtic versus Rangers is a game you want to play in. It will be an unbelievable atmosphere.
"But myself and Michael O’Halloran will be in the stand, cheering the boys on. Hopefully they will get the win."
Although the 21-year-old has mainly been used as a substitute by Mark Warburton, his ability to run at defenders would arguably have been extremely useful in the latter stages of the game against the Hoops, especially as the Scottish Premiership side's biggest weakness appears to be their defence.
And with the game promising to have an intensity that Scottish football has rarely seen over the past few years, it seems possible that the Bhoys' back-line will start to tire as the game heads into the closing stages, which may have provided King with the perfect platform to go on and create the kind of chance that swung the game in the Ibrox club's favour, and potentially saw them book their place in the final.