“Betterton” is not her real name, despite her father`s promotion of the fiction. She is born Julianna Butterton, the daughter of the Newry`s theatre manager William Butterton. His venture fails and he decides there will be financial benefit to him if her name is changed to “Betterton,” claiming links to a famous actor and long dead Thomas Betterton. With this deception he and his family travel round the theatres and the young Julia is acclaimed as an infant acting prodigy in York, the West Country, Bath, and elsewhere.
In 1787, she joins the York Circuit under manager Tate Wilkinson and appears as the Page in Thomas Otway‘s The Orphan, as well as the Duke of York with George Frederick Cooke in Richard III. When Cooke is cast as Glumdalca, the Queen of the Giants, in Henry Fielding‘s burlesque play Tom Thumb, Cooke chooses Julia to play the title role.
In 1790, at age nine, she makes her debut in Scotland at the Dumfries Theatre Royal. In 1795 she goes to Bath and plays the parts of Juliet, Imogen, Desdemona, Lady Macbeth, and Lydia Languish. She becomes well known, particularly praised for her comic role as Languish, and news of her success reaches London. A number of job offers are made, but they are declined by her father. He eventually accepts a lucrative offer, taking her salary for himself, for which she makes her London début in 1797 as Percy by Hannah More.
In 1800, her father sells her in marriage to Samuel Glover, the son of an industrial family from Birmingham, for £1, 000, although the money is never paid. Unhappily married, she has eight children, four of whom survive childhood. In 1820, she plays Hamlet at the Lyceum Theatre to critical acclaim. In 1822, she appears as Nurse in Romeo and Juliet at the Theatre Royal, Drury Lane. Her daughter Phyllis plays Juliet. On February 8, 1837, her father, with whom she has had an unhappy relationship, dies.
One of her sons is Edmund Glover and another is William Howard Glover. In 1850, Glover announces her retirement from the stage. After two weeks confined to her bed, she appears at Drury Lane for her farewell benefit performance on July 12, 1850 as Mrs. Malaprop in The Rivals. She is noticeably ill and weak during her performance and is unable to stand to receive her applause at the end of the play. Instead, the curtain rises to reveal Glover seated, surrounded by the rest of the cast. She dies in London four days later on July 16, 1850. She is buried in St. George’s Churchyard Gardens in London.