Rachel Marcus is a Canadian actress and voice artist best known for her role as Beatrice 'Booky' Thomson in Booky and the Secret Santa (2007) and Booky's Crush (2009).

Marcus' first acting job, apart from school plays, was when at the age of 10 years she landed the starring role of Beatrice 'Booky' Thomson in Booky and the Secret Santa, a made for TV film based upon the novel series by Bernice Thurman Hunter. For her performance as Booky, Marcus received a 2008 Gemini Awards nomination. Her second starring film role was a year later when she reprised her role as Booky for Booky's Crush, for which she received another Gemini Awards nomination. In 2008, she joined the cast of Stoked which premiered on June 25, 2009 on Teletoon. From 2011 to 2015, she voiced Stella in the animated series Stella and Sam.