Northover's other notable film roles include Harry Potter and the Deathly Hallows, The Baztan Trilogy, Lotus Eaters, House of Boys, crime thriller Tutti i rumori del mare and director Mike Figgis' Lucrezia Borgia.

In 2012 he starred in the hit indie feature Lotus Eaters opposite Antonia Campbell-Hughes and Johnny Flynn and the film adaptation of Donizetti's opera Lucrezia Borgia by director Mike Figgis.

[citation needed] In 2014 Northover appeared in Je m'appelle Hmmm..., the directorial debut by agnès b., and in Frédéric Auburtin's epic ensemble film United Passions as Max Kahn, one of the founding members of FIFA, alongside Gérard Depardieu and Tim Roth.

[citation needed] In 2017 Northover was cast in the Nostromo Pictures/Netflix screen adaptation of Dolores Redondo's best-selling three-part crime thriller The Baztán Trilogy directed by Fernando González Molina.

[citation needed] It was announced in the spring of 2018 that production would begin that year on the next two films in The Baztán Trilogy; Legacy of the Bones and Offering to the Storm, with Etura and Northover reprising their roles and Molina returning to direct the two sequels for release in 2020.

[citation needed] His photographic and written work has appeared in various publications including Italian Vogue,[5] Dazed and Confused, AnOther Magazine, and the Mississippi press ‘conversations with filmmakers‘ book series.

[citation needed] For over two decades, Northover was a close collaborator with legendary artist and filmmaker Jonas Mekas, leading to several film and video projects and a number of international gallery exhibitions at institutions including the Centre Pompidou and agnès b.

In March 2017 Northover co-hosted a landmark benefit event in aid of the Archive alongside Steve Buscemi, Greta Gerwig, Michael Stipe and Patti Smith.

The exhibition involved mixed media work by a wide range of artists and filmmakers including Mike Figgis, Douglas Gordon, Lee Ranaldo, Stephen Shore and Jem Cohen.

In 2015 he took part in a gala charity event, honouring playwright and activist Larry Kramer alongside fellow actors Joel Grey and Judith Light.