Katerina Alexandre Hartford Graham (born September 5, 1989) is a Swiss-born American actress, model, singer and dancer. She is known for her role as Bonnie Bennett on The CW supernatural drama The Vampire Diaries (2009-2017).

Her film credits include The Parent Trap (1998), 17 Again (2009), The Roommate (2011), Honey 2 (2011), Addicted (2014), and All Eyez on Me (2017). In music, she was previously signed to A&M/Octone and Interscope Records, and has released two extended plays and two studio albums.

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