Grace Mandeville

Grace Mandeville (born 28 November 1994) is a British actress, vlogger, model, television presenter, and internet personality best known for portraying Holly on CBBC's The Sparticle Mystery and for her and her sister's YouTube channel, "Mandeville Sisters."

Early life and education Grace Mandeville is from Surrey and was born with a foreshortened right arm. She has a younger sister, Amelia, whom she shares her YouTube channel with, and a younger brother. Mandeville attended sixth form in Surrey while filming The Sparticle Mystery. Mandeville chose to pursue acting instead of attend university.

Career

Acting

Mandeville began seriously acting when she was fifteen, getting mostly advertorial jobs. Prior to this she appeared as an extra in Harry Potter and the Order of the Phoenix as a Hogwarts student. In 2010, she was cast as Holly in the CBBC show, The Sparticle Mystery, which premiered in February 2011.

Modeling Mandeville models prosthetics for Open Bionics. In 2015, she modeled a Star Wars themed prosthetic arm for Fashion Finds the Force, designed by Open Bionics. She also modeled a prosthetic arm for Sophie de Oliveira Barata's "Alternative Limb Project" from which Mandeville was featured in the New York Times. Mandeville has also modeled for Dazed magazine and TenEighty magazine.

Personal life

Mandeville lives with her family in Somerset. She began dating Ryan Anthony, a cyber security engineer, in May 2016, and the couple married in August 2019. In January 2022, Mandeville announced that the couple were expecting a baby boy later that year. Her son was born in 2022. In November 2024, Mandeville announced in a YouTube video that she and Anthony were expecting a baby girl in 2025. Her daughter was born in 2025.

Filmography