Luton 0-3 Man Utd.
Henderson returned from his two-year loan spell with Sheffield United during the summer
Goalkeeper Dean Henderson said he dreamed his whole life about making his Manchester United debut, adding that it was "unbelievable".
The 23-year-old returned from his two-year loan spell with Sheffield United this summer as he looks to battle with David de Gea for the no. 1 spot.
The Englishman made some vital saves for United on Tuesday night as they beat Luton Town 3-0 to reach the Carabao Cup fourth round.
Henderson, who came through United's youth system, tweeted: "I dreamt about this my whole life.
"Unbelievable feeling to make my debut for the club I love. Clean sheet and a win to top it off."
Speaking about Henderson's performance, United boss Ole Gunnar Solskjaer said: "You have to make saves when needed.
"David [de Gea] has done that for years and Dean did that today."
Midfielder Juan Mata added: "He did a great save" today.