Captain Harry Kane believes Callum Hudson-Odoi will bring "flair" to the England senior squad after his promotion from the Under-21s.
The 18-year-old, who has yet to start a Premier League match, has been called up for the first time ahead of Euro 2020 qualifiers against the Czech Republic and Montenegro.
Kane said that in itself was a positive step forward for England.
"He has been great. He wants to take full advantage of his opportunities and it looked like he was enjoying it out there," he told a press conference.
"We are excited to have him. Competition for places is huge at the moment, everyone is fighting for a spot and the youth aren't scared to go and express themselves, try their skills and try to score goal and that is what we want.
"As an England team we want that flair and flexibility. It is great sign in this country we are producing these type of players."
West Ham midfielder Declan Rice is another new face in Southgate's squad, having switched allegiance from the Republic of Ireland having played only three friendlies for them.
"I'm sure it was a tough one for him. He's enjoying the season he has been having so far," Kane added.
"He took the time with his family and close friends and the decision he made is one he thinks will be best for his future and no-one can blame him for that.
"I can tell just by being with him for a couple of days he will give everything for his country."
PA
