For her "special, unique" father, Alia had a Shaandaar tweet:
Happy birthday my special,unique MAD father! @MaheshNBhatt ! You make life soo weirdly interesting.. And of course CRAZY ;) I love you!!!? SHAANDAAR Alia (@aliaa08) September 20, 2015
Pooja, the eldest sibling, shared a picture of the Arth director along with her birthday wish.
Shaheen on the other hand, was absolutely honest with her thoughts:
My port in the storm, the love of my life and occasional pain in my neck. Happy Birthday Papa!@MaheshNBhatt pic.twitter.com/GONccFFc9P? Shaheen Bhatt (@shaheenb) September 20, 2015
Born in 1948, Mr Bhatt made his directorial debut with Manzilein Aur Bhi Hain in 1974.
The director rose to prominence with his 1982 critically acclaimed film Arth, followed by Saaransh in 1984, which was India's official entry for the 1985 Academy Award for Best Foreign Language Film.
Movies like Daddy, Aashiqui, Dil Hai Ki Manta Nahin, Sadak, Hum Hain Rahi Pyar Ke and Zakhm further proved his mettle as a director.
In 1987, he turned co-producer with his brother Mukesh Bhatt for the film Kabzaa, under the banner of Vishesh Films.
His last project as a director was 1999 film Kartoos, which stars Manisha Koirala and Jackie Shroff.
His last production was Hamari Adhuri Kahani which stars Emraan Hashmi and Vidya Balan in the lead roles.