- He plays two roles of a young boy who can "cure" a new race of human in three months: the role of Six in Ultraviolet (2006) and Leech in X-Men: The Last Stand (2006).
- Has played a young boy who falls in love with an older woman four times: Birth (2004), Stargate SG-1 (1997) (2005), Walled In (2009) and An American Affair (2008).
- His favorite film is Saving Private Ryan (1998).
- Has already worked twice with Rebecca Romijn: for the first time in Godsend (2004), then in X-Men: The Last Stand (2006), although in the latter they have no common scenes.
- Jason Reitman, who directed him in Thank You for Smoking (2005), gave Cameron a cameo role in his new movie Juno (2007), starring Elliot Page (X-Men: The Last Stand (2006), also starring Cameron) and Jennifer Garner (Alias (2001)).
- He has a German Shepherd named Broomacre's Jetsetter aka Rommel.
- Friend of actress Jodelle Ferland.
- He has an older brother named Bryce Nelson.
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