The Bollywood power couple are already parents to four-year-old Taimur.
The Bollywood power couple welcomed their second-born in Breach Candy Hospital in Mumbai. The arrival of the Khan-Kapoor baby was confirmed by Kareena's father Randhir Kapoor.
Ahead of the birth of their second child, Saif and Kareena had shifted to a bigger home, added the publication.
The couple, who married in 2012 and became a family of three in 2016 with the birth of Taimur, announced they were expecting again last year in August.