The 19-year old was a part-time footballer with Queen's Park in Scotland's third division last season but now finds himself as a regular starter in the Scottish Premiership and part of the Scotland national team squad.
Robertson was called up by Gordon Strachan for next month's international friendly with Poland in Warsaw on Wednesday and was over the moon when he discovered the news.
"It feels amazing and it is a great honour to represent your country," he told Sky Sports.
"Obviously I didn't expect it so soon but I am glad it has happened. It's a bit weird to think back where I was six or seven months ago to where I am now but I am glad the gaffer has given me this chance.
"I will learn a lot from this experience as I will be playing with players in the Premiership, and top clubs, and obviously getting coached by a top, top manager."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball