Megan showed off her killer curves in the figure-hugging dress

The 23-year-old beauty joined co-stars Shia LaBeouf, Isabel Lucas, Josh Duhamel, Ramon Rodriguez and Tyrese Gibson at the Toho cinema in Roppongi Hills for the first screening of the sequel to the 2007 blockbuster.

Hundred of Japanese fans queued for hours to see their idols, while only a lucky few managed to see the eagerly-anticipated film.

The new movie sees Shia and Megan reprises their roles as teenage couple Sam Witwicky and Mikaela Banes, who team up with their Autobot robot friends to stop the Decepticons from destroying the planet.