When the media commented on her resemblance to her father's former co-star Reena Roy, she and Reena have stated that there is no resemblance and that Sonakshi looks like her mother Poonam Sinha.
Sister of Luv and Kush Sinha.
Cousin of actress Bhavna and Pooja Ruparel ( Their maternal grandmothers are sister's).
She was born while Shatrughan Sinha was shooting for Maha Yatra with a full on beard.
Cousin Preeta Sinha is Co-founder at One Green Planet in New York, She is the daughter of Lakhan Sinha.
Niece of director Loksen Lalvani. Loksen is married to Sonakshi's mother's sister.
Niece of producer Dr. Lakhan Sinha.
Niece of Pahlaj Nihalani ( Mother's cousin).
In 2001,brother Kussh Sinha had enrolled himself in dance classes as he was preparing to be a actor. He was also working out with Sohail Khan. He later dropped all plans.