She is the daughter of legendary Indian actor
Shatrughan Sinha and
Poonam Sinha and sister to
Luv Sinha and Kussh Sinha. She started her
career as a model and walked the ramp in the Lakme Fashion week in
2008. She got her break in movies after being signed up by
Salman Khan for his thriller
Dabangg (2010)
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.