Francisco Javier Calvo Guirao (born 21 January 1991) known professionally as Javier Calvo is a Spanish actor, stage, film, and television director and writer. He is best known for his role of Fernando "Fer" Redondo in the Antena 3 series Física o Química (2008–2011). Calvo created and directed the musical La llamada together with Javier Ambrossi, with its success leading to a film adaptation (2017). Continuing their work together, Calvo and Ambrossi would develop the television series Paquita Salas (2016–present), Veneno (2020–2023) and its upcoming sequel Vestidas de Azul (2023–2024), and La Mesías (2023). The director pair are also romantic partners commonly referred to as 'Los Javis'. He has received several awards including a pair of wins in both the Feroz Awards and Fotogramas de Plata, and has received nominations for two Goya Awards.