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Rex Features
The siblings will play a handful of dates in South America in mid-May before heading to Europe and the United Kingdom for a performance at London's Wembley Arena on June 15.
A 44-date North American leg will kick off at Dallas Cowboys New Stadium in Texas on June 20 and close in Ottowa, Canada on August 31.
Jordin Sparks and Honour Society have been confirmed as support.
The trio's most recent tour last summer grossed $30.2 million (£21.8m) from 43 shows and saw audience numbers of 697,000, Billboard reports.
Tickets are on general sale from March 20.
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