The Arsenal forward, just 17, was selected in Sven Goran Eriksson's party for the tournament in Germany in 2006 despite not having played a match in the Premier League.
"I didn't expect the call-up," he told The Observer. "There was a lot of pressure on me straight away.
"With most young players their development is not on the telly or spoken about, but with me it was different.
"The England call-up didn't help my development, because everyone was expecting something straight away.
"In the end it was a good experience, but at the time it was like, 'whoa'."