Kareena won't convert to Islam, to marry Saif Ali Khan

Kareena though has decided to wear her mother in law Sharara during her wedding day but seems like she won’t be following her footsteps in terms of changing her religion to Islam.
 Sharmila Tagore who was a Hindu-Bengali girl converted to Islam for her marriage to Mansoor Ali Khan and changed her name to Begum Ayesha Sultana. But Kareena will not be changing her religion in order to marry her long time boyfriend Saif Ali Khan.
Saif has recently admitted to Hindustan Times :
 "I would never want her (Kareena) to change her religion. That is the trouble with religion really... it expects conversion. I don't buy or believe that. I think it's good that the government, too, has - unless I'm misinformed about the law amended to include it in the Special Marriage Act. If and when we do get married, no one has to change his or her religion."
Bollywood stars Hrithik Roshan (with Suzanne Khan), Fardeen Feroz Khan (with Natasha Madhvani) and Aamir Khan (with Kiran Rao) kept their and their spouses' respective religions and got married by a civil wedding, and it is an admirable act.

Sharmila Tagore & Saba Ali Khan on the Cover of Good Housekeeping – July 2012

Kareena to wear Sharmila’s bridal attire on her wedding

Bollywood is geared up for the next big fat royal wedding of Kareena Kapoor and Saif Ali Khan which is slated to take place on October 16. Many hullabaloo surrounding Saif and Bebo’s wedding but the duo is silent on the entire affair and making arrangement silently. Everyone might be wondering what Kareena is going to wear on her D-day and who will design her lavish bridal attire but the fact unveiled that Kareena Kapoor will wear Sharmila Tagore’s 43 years old sharara (wedding dress) on her wedding.
The interesting fact is that Kareena will wear the dress without any alteration as confirmed by Sharmila Tagore. Kareena’s favorite designer Manish Malhotra who designed Karisma’s wedding dress will put together Bebo’s entire wedding trousseau.

Kareena has been on shopping spree for her wedding and as per report, she has ordered traditional necklace Rajkot based Kruti jewelers worth Rs 40 lakhs.
Sharmila and Soha Ali Khan confirmed Saif and Bebo's wedding date but the bride and the groom are not yet open about their wedding details. They are engrossed in their professional commitments.
They will have a registered wedding at the Pataudi’s palace and the same day in the evening a grand reception with be thrown for all.