There are an estimated 100 Australians fighting in the Middle East with terror groups like Islamic State. About 50 of them are believed to be dual nationals.

Within weeks, the Federal Government will present legislation to Parliament to strip dual citizens involved in terrorist activities overseas of their Australian citizenship.

Although the Government has stopped short of removing citizenship from second generation migrants - who have a right to apply for citizenship of another country - the Prime Minister says it's still on the table for discussion.

The new laws will be based on overseas models, in particular those in the UK.