 Leonidas reprised her role of Katie Bell in "Harry Potter and the Deathly Hallows – Part 1" and "Harry Potter and the Deathly Hallows – Part 2" in 2010 and 2011, before appearing in the stage play "The Real Thing" and the film "Papadopoulos & Sons" in a small role during 2012.She has also appeared in several videos filmed by fellow Harry Potter star Jessie Cave for her website www.pindippy.com.During 2013, she played the lead role of Simone in the short film "Untouchable", appeared as Gemma Raven in the CBBC series Wizards vs Aliens episodes 'The Curse Of Crowe' parts 1 and 2, and performed as Izzy in the Polly Stenham play That Face at London's Landor Theatre during November and December 2013.