Radical UK preacher Anjem Choudary along with Mohammed Mizanur Rahman have been charged under the Terrorism Act.
Choudary, 48 has been accused of “inviting support” for ISIS between 29 June 2014 and 6 March this year, Scotland Yard has said.
He has been accused of supporting the organisation through online lectures with another man, Mohammed Mizanur Rahman, 32, from east London.
They will appear at Westminster Magistrates’ Court on Wednesday.
IS, which is a proscribed organisation means membership of the militant group is a criminal offence, and cannot lawfully operate in the UK.
“It is alleged that Anjem Choudary and Mohammed Rahman invited support for Isis [also known as IS] in individual lectures which were subsequently published online.” Sue Hemming, of the Crown Prosecution Service, said.