Adelaide Helen Calvert (née Biddles; baptised 1836 – 20 September 1921) was a British playwright and actress who achieved a 68-year career.

Calvert was born as Adelaide Helen Biddles in Loughborough and she appeared on stage as "child prodigy".

[2] The play was performed at the Bower Saloon in Westminster which was managed by her father James Biddles.

In October Helen Faucit appeared as Rosalind in two benefit performances for Charles' family.

[citation needed] Calvert died in Barnes on 20 September 1921, after a career of 68 years.