Marc McNulty and Oliver Burke named in Scotland squad
Sheffield Wednesday midfielder Liam Palmer has also been included for the first time.
On-loan Celtic star Oliver Burke has been reinstated to the Scotland squad for the upcoming qualifiers in San Marino and Kazakhstan.
Sheffield Wednesday full-back Liam Palmer and Hibernian loanee Marc McNulty have also been included in Alex McLeish's squad for the first time as goalkeeper Allan McGregor drops out.
The Rangers star, brought back into the international set-up by McLeish, announced his retirement from Scotland on Monday.
Since joining Celtic on a six-month loan-deal in January, Burke has made an impressive start in the Scottish Premiership scoring four goals for the treble-chasing champions.
The pacey 21-year-old winger, who has accumulated transfer fees in excess of £30m, will be looking to make in-roads into the Scotland manager's plans after falling out of favour since making his debut as a teenager.
He picked up his last cap was against Canada in 2017.
Celtic goalkeeper Scott Bain is expected to replace McGregor between the sticks with Millwall's Jordan Archer and Sunderland's Jon Mclaughlin also included.
Palmer, who can also play in midfield, has been a first-team regular at right-back for the English Championship club this season and could be in contention to compete with Cardiff's Callum Paterson and Kilmarnock's Stephen O'Donnell for the role.
Forward McNulty has scored six goals in eight games since joining the Easter Road club from Reading on the last day of the January transfer window.
Former Rangers youth star John fleck also returns to the squad as he bids to win his first full international cap.
The Scots will be keen to get off to a winning start in the European Championships 2020 qualifying group that also includes Russia and Belgium.
On the news of Allan McGregor retiring from International duties, McLeish said: "It is obviously a blow for us, he has been in great form for club and country this season but I knew this day would come.
"I have kept in touch with Allan since he came back into the fold and I know at Hull he had some ailments and some problems so you always wondered when the day would come that we would lose him.
"It was amicable, he knows his body now and obviously wants to play as much club football as he can."
McLeish, who only found out about the decision two days before the squad was announced, also confirmed that he tried to convince the stopper to change his mind.
He said: "Of course we did, but he is suffering on certain parts of his body at this stage of his life."
The Scotland boss has also received positive news on the fitness of Blackburn skipper Charlie Mulgrew and Celtic midfielder Callum McGregor despite current injuries.
And on former Scotland Under-21 international Palmer, he added: "I have to be honest, in recent times he wasn't flagged up but all of a sudden we recognised that Liam was playing extremely well for Wednesday.
"He was a midfielder and he has been converted to full-back, so there was a little bit of that to discuss.
"The fact he has been playing left-back, right-back, midfield, again it's a player of versatility."