The 23-year-old has been included in Roy Hodgson's 22-man party for the forthcoming friendlies against Republic of Ireland and Brazil.
And McCarthy, who will compete with fellow shot-stoppers Ben Foster and Joe Hart for a playing role in the games, is understandably delighted.
"I am over the moon to get the call," he told Sky Sports. "Growing up as a young boy, you dream of playing for your country. I have got that opportunity now."
McCarthy earned his selection after impressing Hodgson despite Reading's relegation from the Premier League.
The form of the goalkeeper, who has two years left on his contract at the Madejski Stadium, has also caught the eye of Liverpool among other clubs if reports are to be believed.
But while McCarthy knows staying in the Premier League would boost his England credentials ahead of the 2014 World Cup, he is in no rush to leave Reading.
"Obviously it is going to help," he said when asked about staying in the top flight to aid in international future.
"It is where the best players are. It gives you more opportunity of playing for the national team.
"But I have still got two years left at Reading. They are my club at the moment so we will have to see what the future holds."