Jenna Marbles is an American YouTube personality. Jenna attended Brighton High School in Rochester, New York. Later, she moved to Boston, Massachusetts to attend college at Suffolk University, obtaining a B.S. in Psychology. She then attended Boston University and obtained her Master's in Sport Psychology and Counseling. Jenna initially started her blogging career with Barstool Sports in Boston, where she wrote for their female counterpart StoolLaLa. Jenna was born Jenna Mourey but later took her dog Marbles’ name as her pseudonym, Jenna Marbles.

Jenna’s video "How To Trick People Into Thinking You're Good Looking" had over 5.3 million views in its first week. Her video "How To Avoid Talking To People You Don't Want To Talk To" was featured in an August 2011 article in the New York Times and ABC News in which she said: "I'm sick and tired of guys thinking that just because I showed up at a club or a dance or a bar, that I want to have their genitalia touching my backside."

Jenna releases a new video every Wednesday aka #SexualWednesday, in which she films, edits and uploads the videos independently from her home. Jenna also has a show on SiriusXM’s Hits 1, ‘The YouTube 15’ featuring emerging and trending music.

In 2013 Jenna released a brand of dog toys called Kermie Worm & Mr. Marbles. The toys' appearances are based upon her real dogs. She has also created assorted items with some of her most memorable quotes on them (e.g. 'what are this?' and ‘Pipe The F Down’)

In March of 2013 Jenna flew to Dublin, Ireland to accept two prestigious awards, the James Joyce Award from the University College Dublin and the Bram Stoker Award from Trinity College Dublin. In July of 2014 Jenna received the Young Hollywood award for ‘Viral Superstar’. In September of 2014 Jenna received the Streamy Award for ‘First Person’.

Jenna resides in Los Angeles, California with her two dogs, Mr. Marbles, a Chihuahua and Kermit, an Italian Greyhound. Jenna is not signed to a network resulting in her working completely independently. Jenna’s YouTube channel currently has over 15.4 million subscribers, making it one of the most subscribed to channels on YouTube and the top channel operated by someone working independently of a network, Jenna is also the only female in the top channels.

Jenna has appeared in many YouTube video collaborations and television shows and movie cameos including, The Show With Vinny (MTV), Annoying Orange (YouTube), Epic Meal Time (YouTube), Epic Rap Battles of History: Adam vs Eve (YouTube), Rob Dyrdek’s Ridiculousness (MTV) and Road Hard (Adam Corolla movie).