Vlahos' parents also work in commercial partnership with one another; his mother as a fashion designer and his father as Business manager. They own and operate the original Cyberdog shop in Camden Market; a futurist and rave-scene fashion, accessory, and toy retailer which they founded together in 1994. Their pet chihuahua, "Chichi the Cyberdog", inspired the name of the store and was featured as part of its brand-image. The family still keeps a chihuahua as a pet in the present-day (as of 2013).
Eros Vlahos was born in London on 13 January 1995. His parents are Terry Davy (mother) and Spiros Vlahos (father), and he has a younger brother (approx. 7 years age difference), Tron Vlahos. He is of British (maternal) and Greek (paternal) ancestry.
In the summer of 2008, at the age of 13, Vlahos wrote and performed his own material at the Edinburgh Festival Fringe. In December of that year, he was recruited to review Christmas pantomimes for the Guardian newspaper and website. He also had a comedy show on Radio London and has appeared on CBBC Extra. He has been involved with the "Comedy Club 4 Kids UK" children's Comedy Academy.
In an interview on GreekReporter about his new role on Da Vinci's Demons and his life, Eros said he likes to visit his friends and family at Filiates, his father’s home village in Greece.
