Karan Johar's mom Hiroo Johar with her grandchildren, Roohi and Yash on her 75th birthday.

Karan Johar made mother Hiroo Johar 's 75th birthday a day to remember. The celebration was kept at a five-star hotel in Bandra. The venue was decorated with Hiroo Johar's favourite flowers, a profusion of pink and purple, but the celebrations had already begun a night prior as a cake was cut at Karan's residence to the birthday song at the stroke of midnight.