Inspirational 24++ Henry Cavill Millie Bobby Brown Henry Cavill Enola Holmes Cast. The enola holmes cast grows as sam claflin joins henry cavill, millie bobby brown, and helena bonham carter in this 'sherlock holmes' spinoff. With millie bobby brown, henry cavill, sam claflin, helena bonham carter. Millie bobby brown as enola holmes, the youngest sibling in the famous holmes family. Superman actor henry cavill will be the next star to take on the iconic sherlock holmes in enola holmes for legendary pictures.