An emotional Luke Shaw admitted he was 'stunned' to hear he had been called up to the England squad for Wednesday's friendly with Denmark, reports Sky Sports.
The 18-year-old was named in Roy Hodgson's 30-man squad as he steps up his preparations for the summer's World Cup.
Shaw only made his Premier League debut in November 2012, but has since been a shining light for Mauricio Pochettino's side, and has been strongly linked with big money moves to Chelsea, and Manchester United.
"It's a very proud day for me, I still cannot believe it," Shaw told Southampton's website.
"I'm only 18. I cannot believe it. I am really excited. It's a massive confidence boost for me.
"Roy rang me this morning and told me I was in the senior team, and that I was there on merit. I wasn't expecting it. I didn't know what to say."
Shaw is the latest star to emerge from Southampton's famous academy, which has produced the likes of England stars Theo Walcott and Alex Oxlade-Chamberlain in recent years.
"I saw (speculation about a senior call-up) on Twitter over the past month but I tried to ignore it," he added.
"I was always thinking I was going to be called up to the U21 squad but to get a senior one is unbelievable."
With Ashley Cole struggling for first team football at Chelsea, Shaw has a decent chances of being selected alongside Leighton Baines for the summer's tournament.
But when asked whether thoughts of playing in Brazil this summer had crossed his mind, Shaw said: "No, nothing.
"There is a friendly and hopefully I will get some game time and keep up the performances I have been having at Southampton and then who knows what will happen."
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