Hudson-Odoi was stunned to be given the chance as a substitute in their 5-0 drubbing of the Czech Republic at Wembley on Friday.
"I couldn't believe it (when I was told to get ready)," Hudson-Odoi told Sky Sports. "I didn't think it was real. I was looking around the crowd and everybody looked happy.
"I didn't know what to do. I want to thank everybody for helping me get here."
It was the first time in over 130 years that England featured two players aged 18 or younger, with Jadon Sancho also starting the game.