Kristen Stewart is ringing in her 21st birthday Saturday, and Breaking Celebrity News is celebrating with a look at her life in pictures.

The quirky Los Angeles native has been on the acting scene since she was just nine,, and her break-through role was almost a decade ago when she played Jodie Foster's daughter in Panic Room.

But it was her starring role as Bella Swan in the Twilight films that made Kristen a household name.

Recognition in the movie world isn't the only thing the vampire flicks got her, though.  Kristen also bagged herself a boyfriend, co-star Robert Pattinson, who plays her love interest Edward Cullen.

The private pair went somewhat public with their romance in February 2010, but were rumored to be dating as far back as the release of the first Twilight installment in 2008.

PHOTO: Injured Kristen Stewart Sports Mystery Cast On Her Wrist