The boyband will play a second date at London's O2 Arena on December 22, 2013, after experiencing high demand for their first show at the venue.
JLS's UK jaunt will begin at Nottingham's Capital FM Arena on December 4, 2013 and conclude at the newly-added date a few weeks later.
The string of shows is in support of their recent fourth studio album Evolution, which reached number three in the UK chart last month.
The collection was led by Top 10 single 'Hottest Girl In The World', and JLS recently confirmed that 'Give Me Life' will be their next release.
Tickets for JLS's second date at London's O2 Arena go on sale from 10am on December 7.
Listen to JLS's new single 'Give Me Life' below: