She is played by American actress and director Ashley Rickards. Hamilton is the daughter of Lacey and Kevin Hamilton, who had Jenna when they were seventeen, and it's mentioned that when Lacey's pregnancy got revealed to Kevin's parents, they had an angry confrontation with her, and too make matters worse, this resulted in her throwing up, but it's unknown if they've made up since then.
Jenna was born on December 2, 1995 in Los Angeles at P. Because her parents had her at a young age, they are childish and embarrassing towards Jenna, as they both try to be her friend rather than a parent.
Jenna has also been struggling to live a "normal life" ever since a misunderstanding which led people into thinking she had a "failed suicide attempt," and because of this she has been counseling with Valerie Marks, who gives Jenna terrible advice and considers Jenna her "best friend." After she dated Collin, her personality, wardrobe and attitude began to change, making her reckless, uncaring and more daring, and as a result she was alienated by her friends, but it's later revealed that Collin still had a sexual relationship with his ex-girlfriend.They started having a friends with benefits, but Jenna started to realize that he's hiding her from others again, and broke it off.She briefly dated Jake Rosati, but broke-up with him to be with Matty.However they briefly worked together to work against new enemy Amber Horn.She has an on-and-off romantic relationship with Matty Mc Kibben, until she cheated on him with Collin Jennings.
But she can be vulnerable, a little selfish with what she wants and placed in very awkward situations, however as of now she has started to grow up and take control with her life, making her even more mature since the series started.