Manchester United striker Welbeck and Liverpool full-back Johnson have both been struggling with injury since linking up with England, having been named in the initial squad earlier this month.
Hodgson had admitted concerns about the pair, but after talks with the Three Lions medical team, they have both been included.
England have also confirmed their squad numbers for the tournament in Poland and Ukraine.
England squad numbers:
1 Joe Hart - Manchester City
2 Glen Johnson - Liverpool
3 Ashley Cole - Chelsea
4 Steven Gerrard - Liverpool
5 Gary Cahill - Chelsea
6 John Terry - Chelsea
7 Theo Walcott - Arsenal
8 Frank Lampard - Chelsea
9 Andy Carroll - Liverpool
10 Wayne Rooney - Manchester United
11 Ashley Young - Manchester United
12 Leighton Baines - Everton
13 Robert Green - West Ham
14 Phil Jones - Manchester United
15 Joleon Lescott - Manchester City
16 James Milner - Manchester City
17 Scott Parker - Tottenham
18 Phil Jagielka - Everton
19 Stewart Downing - Liverpool
20 Alex Oxlade-Chamberlain - Arsenal
21 Jermain Defoe - Tottenham
22 Danny Welbeck - Manchester United
23 Jack Butland - Birmingham
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.