Rosie Day (born March 6 1995) is a British actress. She is known for playing Angel in Paul Hyett's feature film The Seasoning House for which she received great reviews. She is also known for playing Millie Bartham in ITV'S Homefront. She also played Nicolette in ITV's Bernard's Watch and Bernard. She provides the voice of Laura Large in the successful CBeebies show The Large Family. She was also seen playing Tess Elliot in ITV's medical drama: Harley Street playing the daughter of Suranne Jones.

She played Naomi in box office hit 'Spur of the Moment' written by award winning playwright Anya Reiss at the Royal Court Theatre in London's West End.