In an interview for The Lady, McKellen praised his young co-star, saying "Milo was full of the esprit of a young person. He had no fear of the camera or of doing exactly what the director wanted when required." He attends Farlingaye High School in Woodbridge - United Kingdom.
Parker trained at Youngblood Theatre Company and made his feature film debut in the British independent science fiction film Robot Overlords, before starring alongside Ian McKellen in Mr. Holmes, for which he earned a nomination for the Critics" Choice Movie Award for Best Young Performer and 42nd Saturn Awards for Best Performance by a Younger Actor.
