Having been capped at youth levels, the full-back earned his first senior cap for the Three Lions in Tuesday night's 3-2 loss against France in Paris.
It was the perfect end to progressive season for the 26-year-old who made 22 appearances for us in 2016-17 including his first starts in the Champions League.
As he prepared to walk out at the Stade de France, Kieran's mum and dad, Eleanor and Chris, were again at the forefront of his mind.
Below: Kieran in action against France
"It was an amazing feeling being in the tunnel thinking I was about to make my debut," said Kieran, who gave us an insight into the role of his family to his football success in this special feature in December.
"I knew my parents were in the crowd and I was just thinking of them, because they have done so much for me to get where I am now.
"As soon as I saw my shirt, knowing I was starting, the feeling was amazing. I was buzzing and so proud to wear it and to sing the national anthem with my team-mates. The whole experience was unbelievable.
"It's always an honour to play for your country and hopefully there will be many more."
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