Allgood was born on 30 October 1880 at 45 Middle Abbey Street in Dublin, then still part of the United Kingdom of Great Britain and Ireland at the time, a daughter of Margaret (née Harold) and compositor George Allgood. He… See more

Allgood joined the Irish nationalist Daughters of Ireland, where she first began to study drama under the direction of Maud Gonne and William Fay. She began her acting career at the Abbey Theatre and was in the openi… See more

In September 1916, Allgood married her Peg o' My Heart co-star Gerald Henson while they were touring in Melbourne. In January 1918, they had a daughter named Mary who died one day later. In November of that year… See more