The four piece, made up of Jesy Nelson, Perrie Edwards, Jade Thirlwall and Leigh-Anne Pinnock, were put together on the show in 2011.
They became the first group to win the show, mentored by then judge Tulisa.
Over the eight years since, Little Mix have scored numerous hit singles and albums and toured across the world.
According to The Sun newspaper, the group have made over £30 million to date earning £9 million in the past year alone.
The tabloid says the four piece have paid themselves dividends of £1.6 million each from their 2018 earnings.
And it's likely that 2019's figures could top even that thanks to their upcoming tour as well as new fashion deal with PrettyLittleThing.
Little Mix's UK tour dates will begin in Belfast in October before moving on to Dublin, Glasgow, Liverpool, Newcastle, Sheffield, London, Birmingham, Nottingham, Manchester and Leeds.
The tour will conclude back in London at the O2 Arena in November.
You can buy tickets online from Ticketmaster.co.uk.
The girls tweeted as they kicked off the tour in Europe last week: "FIRST DAY OF THE LM5 TOUR and we’re already loving seeing our fans properly again. 🖤 we’ve missed you! So excited to be on the road ✨ #LM5Tour the girls x"
Little Mix's tour comes following the release of their brand new album, LM5.
The record - which you can purchase here - features songs such as Woman Like Me and Think About Us and charted at Number 3 in 2018.
Meanwhile, it was recently revealed that One Direction's Harry Styles is the richest UK reality TV star.
The singer and actor has a reported £58 million worth after rising to fame on The X Factor in 2010 where One Direction finished third.