Alejandro Garnacho Ferreyra (আলেজান্দ্রো গার্নাচো ফেরেইরা) is a professional footballer who plays as a winger for Premier League club Manchester United and the Argentina national team.

Garnacho joined Manchester United's youth system from Atlético Madrid in October 2020. He won the FA Youth Cup and the Jimmy Murphy Young Player of the Year award in May 2022. The month prior, he had made his first-team debut at the age of 17.

Garnacho was eligible to play for his country of birth, Spain, and Argentina, as his mother is Argentine. He made three appearances for the Spain under-18 team in 2021.

On 7 March 2022, Garnacho was called up to the senior Argentina team as part of an initial 44-man squad for their two World Cup qualifiers that month. He made it to the final 33-man squad for the fixtures, but did not make an appearance in either game.

Garnacho made his debut for the Argentina under-20 side on 26 March, when he started in a friendly match against the United States. He scored four goals in four appearances for the under-20 team at the 2022 Maurice Revello Tournament winning the Revelation Player and Goal of the Tournament awards.

An energetic forward, Garnacho has been praised for his speed and dribbling abilities, as well as his ability to create chances and get into the box. He is considered one of the most promising prospects of Manchester United's academy. At United, he has frequently been deployed as a winger on either the left or right flank. United coach Mike Phelan described him as "everything that Manchester United is about" and "an intelligent player who understands his role in the team".

His style of play has been heavily influenced by that of former United teammate Cristiano Ronaldo, whom he idolizes. He frequently performs Ronaldo's iconic goal celebrations when scoring goals himself.

Garnacho was born in Madrid to a Spanish father, Alex Garnacho, and an Argentine mother, Patricia Ferreyra Fernández. He has a younger brother named Roberto. His father Alex is closely associated with management firm, Leader Sports Management, who currently represent Garnacho.