- With Dutch National Ballet since: 2020
- Place of birth: Madrid, Spain
- Carreer with Dutch National Ballet: Junior Company 1st year (2020)
- Training: Guillermo started his ballet training at the Real Conservatorio Profesional de Danza Mariemma in Madrid in 2008. After graduating from this school in 2018, he was offered a scholarschip to study at The Royal Ballet Upper School and left Madrid behind to move to London. During his studies, he performed in several productions of The Royal Ballet, such as Sleeping Beauty. Guillermo graduated from The Royal Ballet Upper School in 2020.