Islamic speaker, Zakir Naik, will address Sugathadasa Stadium in Colombo, reports Miadhu.
Organisers said they expect around 50,000 people, adding many Maldivians living in Colombo will attend.
Naik, a medical doctor trained in Mumbai, will be transported in a helicopter and his lecture will be opened by Governor of the Western Province, Alawi Wauluana.
Organisers said the Colombo lecture will run for about four hours and the Sri Lankan government is providing security in the stadium and surrounding areas.
Naik has been invited to speak in the Maldives, but his original lecture was postponed. Naik is now scheduled to appear at the end of the month.