Alejandro "Álex" Grimaldo García (born 20 September 1995) is a Spanish professional footballer who plays as a left wing-back for Bundesliga club Bayer Leverkusen and the Spain national team.

He made his official debut for the B-team on 4 September 2011, starting in a 4–0 away win against Cartagena at the age of 15 years and 349 days and becoming the youngest player ever to appear in a Segunda División game, before he was surpassed by Lamine Yamal in 2023.

[14] Grimaldo's first full season began on 7 August 2016, as he started in a 3–0 win against Braga for the Supertaça Cândido de Oliveira in Aveiro, assisting Franco Cervi for the opening goal.

[17] Grimaldo's maiden appearance in the UEFA Champions League took place on 13 September 2016, when he played the entire 1–1 group stage home draw to Beşiktaş.

[18] His first goal in the competition came during the same stage but on 2 October 2018, in a 3–2 away win over AEK Athens;[19] he repeated the feat against the latter opponent on 12 December in the return fixture, his 30-meter free kick in the 88th minute helping to a 1–0 victory.