"To the world, she was their Chandni... the actor par excellence... their Sridevi but to me she was my love, my friend, mother to our girls... my partner," he wrote.
The letter was shared from the Twitter account of the late actress.
Read What Boney Kapoor said after Sridevi's death:
Sridevi passed away following an accidental drowning in a bathtub in her hotel room in Dubai around 11 p.m. on February 24.
Actor-filmmaker Satish Kaushik had said after the sudden demise of actress Sridevi, her husband couldnt stop crying.
"When I heard of ma'am's (Sridevi) death, I couldn't believe it. Boney and I have been friends for 30 years. I called him up. He wept inconsolably. The more we spoke, the more he wept. He just couldn't stop crying. I hung up," Satish was quoted by IANS as saying.
The mortal remains of Sridevi, draped in the Tricolour were cremated with full state honours at the Vile Parle crematorium in Mumbai. Boney Kapoor performed the last rites at the ceremony.