4.3.2.1. is a 2010 British crime thriller film directed by Noel Clarke and Mark Davis, written by Clarke and starring Emma Roberts, Tamsin Egerton, Ophelia Lovibond, Shanika-Warren Markland, Mandy Patinkin, Helen McCrory, Kevin Smith, Susannah Fielding, Camille Coduri and Clarke. 4.3.2.1. follows four spirited young women who get caught up with a diamond theft heist.

Noel Anthony Clarke is an English actor, producer, screenwriter, and director. Rising to prominence for playing Mickey Smith in Doctor Who (2005–2010), he received critical acclaim for writing, directing, and starring as Sam Peel in the films Kidulthood (2006); Adulthood (2008); and Brotherhood (2016) and for starring in, co-creating, and writing Bulletproof (2018–2021), which all depicted black working-class characters in London.