While Irani is 38 years old, Heptullah is 74.
Incidentally, both of them are from the Rajya Sabha representing Gujarat and Madhya Pradesh respectively.
Irani, who had unsuccessfully contested against Congress Vice President Rahul Gandhi in Amethi, has been sworn-in as Union Cabinet Minister as is Najma.
A former National President of BJP's women's wing, Irani now holds the position of Vice President in the party.
Irani was born in Delhi and had her education in the national capital before she shifted to Mumbai and became a household name because of her role in the TV serial "Saas Bhi Kabhi Bahu Thi" for her portrayal of the character of Tulsi.
Heptullah was Deputy Chairperson of Rajya Sabha and had shifted to BJP from Congress.
The other women members of the Union Cabinet include Sushma Swaraj, Uma Bharti, Maneka Gandhi and Harsimrat Kaur Badal.
Swaraj (62), Bharti (55), Gandhi (57) and Badal (47) have been inducted as cabinet ministers. BJP spokesperson Nirmala Sitharaman (54) has been sworn-in as Minister of State (Independent Charge).
Heptullah, the lone Muslim face in the Modi Cabinet, was elected to the Upper House five times between 1986 and 2012.