Born Alejandra Sánchez Barrero to Gabriela Barrero and Jaime Sánchez Rosado, she was the first of three sisters, the others being Valeria and Mariana. She studied at the Colegio Alemán Alexander von Humboldt, where she learned fluent German and English, and later went on to finish her high school studies at the American School Foundation, also in Mexico City.
Alejandra Sánchez Barrero was born to Gabriela Barrero and Jaime Sánchez Rosado; she is one of three sisters named Valeria and Mariana. She studied at the Colegio Alemán Alexander von Humboldt, where she learned proficient German and English, and later continued her high school education at the American School Foundation in Mexico City.