Antonella Alonso also known by her stage name LaSirena69 is a Venezuelan pornographic actress.

Alonso was born in Baruta and studied social communication for a couple of semesters at the Santa María University, but dropped out to study advertising at the New Careers Institute (Spanish: Instituto Nuevas Profesiones) in Las Mercedes. She wrote her humanities mention thesis on geishas, and during the two years of the diversified cycle, she wrote a paper entitled "Approaching a concept of women to understand the geisha", which dealt with women working in the sex industry, from the hetairas of ancient Greece and Japanese geishas to contemporary prostitution. In March 2015 she emigrated to Miami, where she lived for three years, and after several job dismissals for exhibiting herself in erotic photographs through her social networks, she began to sell her nude photographs. A year and a half later, she moved to Los Angeles, where she met a porn star who put her in contact with the adult industry, the way she started her career in industry.