Rosie Day (born 6 March 1995) is an English actress. She is known for playing Mary Hawkins in the Golden Globe nominated Starz and Sony Pictures TV series Outlander and Sarah Jessica Parker's daughter in the comedy road film All Roads Lead to Rome, which she co-starred in. She also stars as Tina Pemberton in Sky One's Living the Dream alongside Phillip Glenister and Lesley Sharp and the 2018 Lionsgate feature Down a Dark Hall alongside Uma Thurman.
Her first film was playing Angel in Paul Hyett's feature film The Seasoning House for which she received positive acclaim and won four Best Actress awards. Acting since a young age she has starred in many TV shows and dramas such as ITV's Homefront, Harley Street, Grantchester, BBC's Siblings, Cuffs, and Channel 4's Misfits.
She played Naomi in the stage play hit Spur of the Moment by award-winning playwright Anya Reiss at the Royal Court Theatre in London's West End.
In 2013, she made her feature film début in the horror thriller The Seasoning House in the lead role of Angel, alongside Sean Pertwee, with CineVue stating: "Equally clear, is that Rosie Day has a long screen career ahead of her, as she effortlessly carries the entire film on her slight shoulders".
Rosie was chosen as one of Screen Internationals Stars of Tomorrow.
In 2015, she became a series regular on Sony and Starz Golden Globe winning show Outlander.
In 2017, she stars alongside Uma Thurman in Down a dark hall for Lionsgate. Butterfly Kisses, a film in which she was the lead, won the Crystal Bear for best feature at the 67th Berlinale festival. She stars as Tina in the Sky series Living the Dream.
She is an ambassador of Stem4 a charity that educates on teenage mental health.