Whoa! Jennifer Lawrence just turned up the sex factor!

The sometimes-tomboy turned up to the London premiere of The Hunger Games: Mockingjay Part 2 in a revealing, floor-length gown, while co-stars Liam Hemsworth and Josh Hutcherson stood stunned at the actress' fashion daring.

In the highly-anticipated final film in the series, with the nation of Panem in a full scale war, Katniss (Lawrence) confronts President Snow (Donald Sutherland). Along with a group of her closest friends, Katniss embarks on a mission with the unit from District 13 as they risk their lives to liberate the citizens of Panem and try to kill President Snow. Check out the latest clip from the film ...