A British housewife-turned-terrorist known as the “White Widow” is training an all-woman army of suicide bombers for ISIS, it was reported Sunday.

Samantha Lewthwaite, whose husband blew himself up in the 2005 London bombings, joined ISIS this year and is now one of its most influential female members — dubbed the “Special One” or the “Important Woman,” Britain’s Daily Star reports.

“Her most powerful weapon is her use of propaganda. She may well be orchestrating the videos we have been seeing emerge from [ISIS] in the last few weeks,” an intelligence source told the paper.

Lewthwaite, 30, has been the world’s most-wanted woman since Interpol issued a “red notice” for her arrest following last year’s deadly terror attack on the Westgate mall in Nairobi, Kenya.

Reports suggest she was a “pale-skinned” woman seen firing shots and directing attackers.

In 2012, Kenyan authorities accused her of ties to Somalia’s al-Shabab terror group and said she had plotted an attack at a resort.

Lewthwaite, a Muslim convert, was pregnant with her second child when husband Germaine Lindsay launched a suicide attack on a London subway.

She publicly denounced his actions but wed British-born Muslim Habib Ghani, who reportedly died on a terrorist mission.