The Sun used its front page on Wednesday to set out various of its editorial positions
People now have to pay to read The Sun newspaper online.
The online version is called Sun+ and costs subscribers £2 per week. The print tabloid is published everyday and costs £3.20 a week.
Other UK newspapers such as The Times, Telegraph and Financial Times already charge for online access.
Rupert Murdoch's News UK, which owns The Sun, announced the paywall in March, saying free online access had become "untenable".
Online readers get free access to 20 articles each month before they have to pay.
The Sun has a circulation of 2.3 million in print, while about 1.7 million people visit its website each day.
The Times, also owned by News UK, introduced its own paywall three years ago.
Sun+ will try to attract subscribers with offers such as video of all Premier League goals.
Source: BBC News - Business http://www.bbc.co.uk/news/business-23524897#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
