Capello originally selected David James, Chris Kirkland and Joe Hart for the friendly double-header.

The 20-year-old has been added to the party because of fitness concerns over Kirkland, who has a back injury, while James has only recently returned from a calf injury.

Lewis had only made his debut for the Under-21 side as a substitute for Hart in 2-0 the win over Wales as recently as May 15.

But the Posh goalkeeper was overjoyed by Capello's decision to promote him to the full squad.

"I am over the moon and thrilled with the call-up - it came out of the blue and I am enjoying every minute of it," Lewis said.

"I trained with the squad on Saturday morning and it was superb to be involved with the best players in the country.

"There's a second training session at 5pm on Saturday and it is a fantastic experience for me.

"I managed to make a couple of good saves, which was a great feeling, especially from Wayne Rooney and Steven Gerrard. It is a great end to a fantastic season."

Posh director of football Barry Fry felt the promising goalkeeper - who was signed from Norwich for £400,000 in the January transfer window - will benefit from time with the squad.

"This is fantastic news for Joe and Peterborough United," he told www.theposh.co.uk.

"I believe there has been an injury to one of the goalkeepers in the squad and they have called Joe up. It will be a fantastic experience for him."