Gruen (previously known as The Gruen Transfer) is an Australian television program focusing on advertising, which debuted on the ABC on 28 May 2008. The program is hosted by Wil Anderson and produced by Andrew Denton's production company, Zapruder's Other Films, now part of CJZ. Anderson is accompanied by a panel of advertising industry experts including Russel Howcroft (originally of George Patterson Y&R) and Todd Sampson (previously of Leo Burnett).

The title refers to the Gruen transfer, the response to designed disorientation cues in retail environments.The show's debut episode drew an audience of nearly 1.3 million, the highest debut for an entertainment program in the ABC's history. The concept has been sold to TV production companies in the UK, Denmark, France, Italy, Portugal, South Africa and Spain; however, the program itself seems to be unavailable in those markets and is blocked on YouTube and Apple's iTunes store, with the message "Viewable in Australia only".

The Gruen Transfer was nominated for an AFI award for Best Light Entertainment Television Series in 2008.A spinoff series, Gruen Nation, aired during the 2010 Australian federal election and again for the 2013 Australian federal election. A second spinoff series, Gruen Planet, took over from the fourth series of The Gruen Transfer on 28 September 2011, focusing on corporate and government global media strategies and public relations. Another spinoff series entitled Gruen Sweat examining the branding and marketing of the 2012 London Olympics began airing from 25 July 2012. The spinoff series titled Gruen began airing on 9 September 2015, following the original concept of The Gruen Transfer series.