Robert Kazinsky was born Robert John Appleby in Haywards Heath, the son of Phyllis and Paul Appleby. He grew up in Brighton. He has an older brother, Michael. Kazinsky is Jewish. His parents are descended from immigrants from Poland and Russia. He is a fluent speaker of Hebrew. Kazinsky was educated at Hove Park School in Hove, from 1995 to 2000. He appeared in their productions of Bugsy Malone and A Midsummer Night's Dream. Kazinsky trained as an actor at the Guildford School of Acting from September 2002 to July 2005. He took his grandfather's middle name as his stage name.

For more information press link below:
https://en.wikipedia.org/wiki/Robert_Kazinsky