Jenkins made her professional acting debut at the age of four in a touring production of Joseph and His Technicolour Dreamcoat.
In 2007, at the age of six, Jenkins made her television debut in an episode of the Channel 5 series Hanrahan Investigates, as Kelly Bicknell.
Following this, she continued her acting career, playing the role of Little Eponine, and subsequently Little Cosette in two consecutive runs of Les Misérables at the West End's Queen's Theatre.
[4] As a child, she had roles in numerous other West End productions, including Matilda, Scrooge, The Wizard of Oz and Gone With the Wind.
[11] She also played the lead role in the short film Tiny Dancer, as well as featuring as a recurring character in the Prime Video series Hanna.