England manager Sven-Goran Eriksson has confirmed his 23-man squad for this summer's World Cup.
Eriksson knows he has taken a gamble with Walcott
Eriksson has not made any changes from the provisional list of players he announced last week, which included 17-year-old Theo Walcott.
Injured striker Wayne Rooney is in the squad and Eriksson has until 24 hours before the team's first game on 10 June to decide whether to replace him.
Jermain Defoe and Andrew Johnson are on standby if Rooney fails to recover.
Eriksson will take his players to a training camp in Portugal to start preparations for the finals in Germany during the summer.
He will be without Arsenal defenders Sol Campbell and Ashley Cole, who will be travelling to Paris for the Champions League final against Barcelona on Wednesday.
But their team-mate Walcott has been allowed to link up with England after discussions between Gunners boss Arsene Wenger and Eriksson.
Striker Walcott was the shock choice by Eriksson but is set to play some part for England during their warm-up games in the build up to the World Cup finals in Germany.
He is expected to figure in an England B game against Belarus on 25 May.
Newcastle forward Michael Owen is also set to play as he bids to regain his fitness after breaking a bone in his foot in December.
The rest of the squad will have warm-up matches against Hungary on 30 May and Jamaica on 3 June, with both games being played at Old Trafford.
Left-back Ashley Cole is one of the players likely to benefit from the matches before the team travel to Germany and he has thanked Eriksson for sticking with him during an injury-blighted campaign.
"When I did my thigh I didn't have that long left until the squad was announced and then I did my ankle so I thought I was never going to be picked," he told BBC Radio Five Live.
"But the manager has always stuck by me and always given me the confidence that if I play more than five minutes I will get in the squad.
"I've played three games so I'm happy.
"He spoke to me, came to the training ground and spoke to the manager and physio. He came to see me train and in reserve games so I owe him a lot."
Goalkeepers: Paul Robinson (Tottenham), David James (Manchester City), Robert Green (Norwich)
Defenders: Gary Neville (Manchester United), Rio Ferdinand (Manchester United), John Terry (Chelsea), Ashley Cole (Arsenal), Sol Campbell (Arsenal), Jamie Carragher (Liverpool), Wayne Bridge (Chelsea)
Midfielders: David Beckham (Real Madrid, Spain), Michael Carrick (Tottenham), Frank Lampard (Chelsea), Steven Gerrard (Liverpool), Owen Hargreaves (Bayern Munich, Germany), Jermaine Jenas (Tottenham), Stewart Downing (Middlesbrough), Joe Cole (Chelsea), Aaron Lennon (Tottenham)
Forwards: Wayne Rooney (Manchester United), Michael Owen (Newcastle), Peter Crouch (Liverpool), Theo Walcott (Arsenal)
Standby: Scott Carson (Liverpool), Luke Young (Charlton), Nigel Reo-Coker (West Ham), Jermain Defoe (Tottenham), Andy Johnson (Crystal Palace)