Fonejacker is a British sketch comedy show that aired on E4, featuring prank phone calls made by various characters, all voiced by British-Iranian actor Kayvan Novak.

In 2005, Kayvan Novak and Ed Tracy created, wrote and directed Fonejacker,[1] a prank call show, as part of Channel 4 Comedy Lab.

After making the pilot together[1] they were given a Christmas special and a six-part series which began airing in the UK on 5 July 2007 on E4 and lasted 6 episodes.

[6] Novak plans to create a film based on the show's characters, and is currently in talks with Film4 and Hat Trick Productions.

[7] The show features a masked prank caller (Kayvan Novak) who phones unsuspecting members of the public under various guises, in an attempt to confuse or 'wind up' the recipient.

The audio is accompanied by on-screen imagery, consisting of pictures of people with crudely animated moving mouths, or by undercover filming in which Novak is in a street calling a company nearby, usually from inside a public phone booth or from a rickshaw.

to divert it from reason and logic, usually followed by Novak calling Directory Enquiries as Mr Doovdé on an American pay phone.

The rooftop where the pre-title sequence fonejack takes place is on top of Guy's Hospital, in Central London.

In March, a teaser trailer started to air on Channel 4 and E4, which consisted of clips of the pilot put together into a thirty-second advert, ending with e4.com/fonejacker, which redirected users to the Fonejacker MySpace page.

On 28 December 2008, Kayvan as the Fonejacker wearing his trademark balaclava provided on video the answer to a question, regarding Jeremy Clarkson publishing his bank account details in a newspaper, on the Channel 4 show The Big Fat Quiz of the Year.

In 2010, Fonejacker took part in Channel 4's Comedy Gala, a benefit show held in aid of Great Ormond Street Children's Hospital, filmed live at the O2 Arena in London on 30 March.

As of June 17, 2021 Fonejacker returned in the form of a podcast featuring all new prank calls, bringing back Kayvan’s classic characters such as Terry Tibbs, Brian Badonde and Irish Mike.