I Am Number Four
Dianna may be busy filming Glee at the minute - the all-singing all-dancing cast are currently shooting scenes for an MJ, Thriller-themed episode - but she's about to become a big screen sensation too, with her sci-fi thriller, I Am Number Four released next month.
Also starring Dianna's real-life beau Alex Pettyfer, who plays a fugitive with unexplainable powers, the loved-up pair must together flee the ruthless enemies who pursue him.
A real departure from Dianna's role in Glee as cheerleader Quinn; we look forward to catching her in a new darker guise.
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By Hayley Spencer