"Nicki likes lip gloss, purses, yoga, pole dancing, Uggs, Louboutins, juice cleanses, iced coffee and tattoos," Watson wrote in a follow-up post.
The Bling Ring is based on the true story of the Hollywood Hills Burglar Bunch.
The group stole more than $3 million in goods from celebrities such as Lindsay Lohan and Paris Hilton between October 2008 and August 2009.
Sofia Coppola (Lost in Translation) wrote and directed the film, which will reportedly feature socialite Hilton in a cameo role as herself.
Hilton is said to have filmed her scene at the Sayers Club in Hollywood with Watson and Gavin Rossdale.
Kirsten Dunst, Taissa Farmiga and Israel Broussard are among the supporting cast for the crime drama, which opens in cinemas in 2013.