The 26-year-old was released by the Ibrox club in 2014.
Andy Little has insisted that he is delighted that former club Rangers are on the verge of reaching the finishing line following their long journey back to the Scottish Premiership, but conceded that he is somewhat envious of the current Gers squad who get to complete the journey, the Daily Record reports.
The Preston North End forward spent eight years with the Light Blues and was one of the players that defiantly stuck around when they were demoted to the bottom tier.
But despite being instrumental in helping Ally McCoist's men secure promotion at the first attempt - scoring 22 goals in 28 league games - before helping them win the League One title one year later, King was released at the end of the 2013-14 campaign.
And with new manager Mark Warburton leading the side to the cusp of the Scottish Championship title, Little admitted that a small part of him will be slightly disappointed that he is not there with the likes of Lee Wallace and Barrie McKay who also were present when the long road back to the top began.
"I'm delighted mostly for the lads who have been around for the duration of the journey - but I'm a little bit jealous, too. I can’t deny that," he told the Record.
"But I'm happy for the boys and you can't look further than Lee Wallace. He just epitomises everything that I believe a Rangers player should be.
"His attitude is second to none. He is football mad - I've never met someone who is just so immersed in football. He watches every game he can.
"I'm delighted for him and I am glad there is someone like that at the club. Davie Weir is another one - the kind of players who know what the club is all about."
While the 26-year-old will not be part of the squad that celebrates promotion - which could be secured on Saturday if results fall in the Gers' favour - his role in their return will surely not be unappreciated by the long-suffering supporters.
Although he was not a first-team regular before their demotion to the Third Division, he had shown glimpses that suggested that he had the potential to be a special player - scoring in an Old Firm clash against Celtic in 2012 - and thus, he may have been forgiven for jumping ship when the off-field problems began.
However, he stayed and went on to play an important role during those first two years in the wilderness, so is arguably unlucky not to be one of the men that will soon confirm their return to the top flight.