Alejandra Onieva Molas (born 1 June 1992) is a Spanish actress best known for appearing as Soledad Castro Montenegro in the long-running telenovela El secreto de Puente Viejo,[1] and in the Spanish Netflix original series Alta Mar (High Seas).

She started studying advertising, public relations and fashion but shortly thereafter she left her university because she had been selected to play one of the main roles in the daily series El secreto de Puente Viejo.

Beginning in 2015, she joined the cast of the planned Antena 3 series La sonrisa de las mariposas.

At the end of the same year she premiered Presumed Guilty, together with Miguel Ángel Muñoz, on Antena 3.

In May 2019, the first season of the Spanish Netflix original series Alta Mar (High Seas) premiered, with Onieva and Jon Kortajarena as the leading couple.