
The daughter of Mr. and Mrs. Robert Cassidy, Catherine Calvert was born and raised in Baltimore, Maryland.
She made her stage debut in the play Brown of Harvard in September 1908, in Albany, New York. On Broadway, she portrayed Laura Moore in The Deep Purple (1911), May Joyce in The Escape (1913), and Dona Sol in Blood and Sand (1921).
After many years' experience onstage in productions including The Deep Purple (a play by her future husband, Paul Armstrong), in 1910, she entered films via Keeney Pictures Corporation in A Romance of the Underworld (1918; based on a play in which she had appeared onstage).
Other films in which she appeared include Marriage, Out of the Night, Career of Katherine Bush, Marriage for Convenience, and Fires of Faith. Around 1920 she was a star of Vitagraph Studios.
Calvert married Paul Armstrong in New Haven in 1913. They remained wed until his death in 1915. She later married Canadian grain exporter George A. Carruthers.
In 1971, Calvert died in Uniondale, New York, at age 80.

Moral Fibre
1921 · as Grace Elmore

That Woman
1922 · as Adora Winstanley

House of Cards
1917 · as Mrs. Manning

Marriage for Convenience
1919 · as Natalie Rand

The Heart of Maryland
1921 · as Maryland Calvert

Out to Win
1923 · as Auriole Craven

Out of the Night
1918 · as Rosalie Lane

A Romance of the Underworld
1918 · as Doris Elliott

Fires of Faith
1919 · as Elizabeth Blake

You Find it Everywhere
1921 · as Nora Gorodna

Dead Men Tell No Tales
1920 · as Eva Dennison

Think It Over
1917 · as Alice Rowland

Marriage
1918 · as Eileen Spencer

Behind the Mask
1917 · as Margaret Stanton

The Green Caravan
1922 · as Gypsy

The Indian Love Lyrics
1923 · as Queen Vashti

The Career of Katherine Bush
1919 · as Katherine Bush

Outcast
1917 · as Valentine