Publication of men's magazines FHM and Zoo has been suspended.
The move was announced simultaneously on Twitter and their websites fhm.com and zootoday.com.
A message on the FHM website said: "Unfortunately it's true and it has been announced today the intention to suspend publication of FHM."
A statement on the Zoo homepage said: "Gents, we have some news. It is with regret we have to inform you of the intention to suspend publication of Zoo."
A spokesman for the magazines' publisher, Bauer Media, declined to comment on why the decision was taken to suspend the digital and print operations for both titles, but referred to a statement that said "young men's media habits have continually moved towards mobile and social".
The publisher said FHM and Zoo attracted a combined digital audience of over five million. However figures from the Audit Bureau of Circulation showed FHM's print circulation dipped below 100,000 last year, far below its peak of 700,000 copies per edition in 2000.
Rival "lad's mag", Loaded, first published in 1994, closed in May this year after circulation declined from 350,000 in 2000 to 35,000 in 2011.
FHM first appeared on shelves in 1985 as For Him Magazine, before abbreviating the title in 1994. Its blend of scantily-clad glamour models and entertainment proved to be a hugely popular mix.
The monthly magazine went on to be published in various forms in 27 countries including Pakistan, China and South Africa.
The magazine prided itself on the annual FHM 100 Sexiest Women in the World, that claimed to have "helped propel the careers of many well-known actresses, musicians and models".
American actress Sarah Michelle Gellar clinched the top spot in its inaugural year in 1999, while she was star of the hit US show Buffy the Vampire Slayer. Coronation Street Star Michelle Keegan was named the 2014 winner in April.
As tastes changed the magazine attempted to keep pace, adjusting its content to be closer in style to men's titles GQ and Esquire and appeal to "modern twentysomething men". Its final issue for December this year featured suited Real Madrid footballer Cristiano Ronaldo discussing "babies, brands and golden boots".
A message posted on the FHM website stated: "It's been an absolute joy producing the magazine over the years. Thank you for all your support, we will keep you updated with developments over the coming weeks."
FHM's sister publication also facing suspension, Zoo, launched in 2004 as a rival to Nuts, published by rival IPC Media, with a similar format of swimwear models and light entertainment aimed at men "defined by their attitude rather than age" in the 18 to 35-year-old bracket.
Nuts magazine was pulled from shelves a decade after its launch in April last year.
A message on Zoo's homepage read: "We've loved every minute of the near 12 years and 600-plus issues we've shared with you and would like to thank each and every one of you who've been there with us along the way."
In a statement posted on the Bauer Media website publisher Gareth Cherriman praised the work of the titles' editor-in-chief Damien McSorley, who was only appointed in July. He said: "I'm sure that everyone who has worked on FHM and Zoo over the years will be sorry to hear this news."
A spokesman for Bauer Media said "about 20" jobs in FHM and Zoo's combined editorial department were at risk, including the editor-in-chief, although advertising staff would not be affected.