Born in London, England, Harry moved with his family at the age of ten to Sydney, Australia. Being brought up watching countless films and London West End stage shows, Harry's dream was to become an actor.
It was during those early years in London that Harry caught the acting bug and began acting in StageCoach London theatre productions of Oliver and Bugsy Malone.
Harry's love of acting continued to grow after his move to Australia where he combined his school studies with acting classes at both the Northern Beaches Youth Theatre and the Point Break Drama Academy.
While he had featured roles in an American Nintendo Wii advertisement, as well as a local Foxtel commercial, it was the break of his career when Harry landed the lead role of Larry Conway in the 2009 feature film Accidents Happen (2009) starring opposite Academy Award winner Geena Davis as her on-screen son.
Directors & Producers were soon to cast Harry in something new and just two months after completing Accidents Happen (2009) Harry landed his next lead role as Archie Cox in the 2009 thriller feature film Caught Inside (2010) which was shot in the Maldives.
2009 started off strongly for Harry, taking a theatre approach by being cast as the lead role of Tom, in Mark Ravenhills Australian premiere of the controversial play "Citizenship" Directed by acclaimed Director Lee Lewis.
Later in 2009 Harry took to his first television appearance playing Susie Porter's nephew in the Logie Award winning children's series "My Place" (2009)
In 2010 we saw Harry in his first TV movie playing the lovable character of Chook in Channel 9 Australia's Panic at Rock Island (2011) (TV)
After being away from the theatre for a couple of years, Harry starred in "Russetts" at the Corpus Playroom in Cambridge in England for the 2012 International Playwright Competition which the play eventually went on to win. While over in the UK, Harry was offered the role of Meat in Drown (2013/I) which he returned to Australia to film.
In 2013, Harry played the cameo role of Jordan opposite Sam Neill & Bryan Brown in the Matchbox Pictures TV series Old School.
Cook is represented by Linsten Morris Management in Australia and by Mark Robert Management in LA.