Dianna Agron wants you to know -- she's edgy! The Glee star showed off those tatas when she posted a topless Instagram snap on Wednesday.

The 28-year-old actress, who has been playing Quinn Fabray on the hit FOX show since 2009, shared the pic from her photo shoot with noted photographer Brian Bowen Smith. In the pic, the platinum blonde stand profile, showing off her -- and giving the camera a sultry look.

Looks like lil' blondie has a sweet tatt -- who knew?!