"Its official! @sonakshisinha is part of one of the films I'm looking forward to watching the most. ONCE UPON A TIME IN MUMBAI..AGAIN," Sonakshi Sinha's brother Luv said on Twitter.
Earlier Kareena Kapoor and Kangana Ranuat were reportedly approached for this role. This will Sonakshi's third outing with Akshay.
She has teamed up with the actor in Shirish Kunder's 'Joker' and Prabhu Deva's 'Rowdy Rathore'. Both the films are slated to release this year.
The sequel to 'Once Upon a Time in Mumbai', which also stars Imran Khan, is be directed by Milan Luthria.
Akshay will be playing Shoaib, a character modelled on underworld don Dawood Ibrahim in the movie.
Photos: Huma Qureshi, Neha Dhupia and other celebs at MAMI
Flashback: When sexy models sizzled in bikinis at Tokyo fashion show
Photos: Amy Jackson, Daisy Shah at Mumbai airport
Photos: Sridevi, Irrfan and other celebs at 'Mughal-e-Azam' screening
Photos: WWE Diva Kelly Kelly sizzles in bikinis on Instagram