Sistine Stallone showed off slight-frame in a backless grey gown at the Venice Film Festival on Sunday (04.09.16).
The 18-year-old star – who is the teenage daughter of Hollywood legend Sylvester Stallone – showed off plenty of side-boob in the revealing ensemble.
The brunette beauty also showed off her perfect pins in the barely-there dress, which had a massive slit running up the right leg.
Sistine Stallone flaunts side-boob
