Sosie Bacon was born on March 15, 1992 to parents Kevin Bacon and Kyra Sedgwick. Her mother gave birth shortly after filming Miss Rose White and named Bacon after the movie's art Director, Sosie Hublitz. Despite her parents having successful acting careers, Bacon was provided with a "fairly ordinary" upbringing according to Producer James Duff, and Bacon's parents were determined that she not get into acting. During the filming of The Closer, Bacon's mother would spend half of the year in Los Angeles, while Bacon would stay in Manhattan with her father and brother. Her mother credited this as leading to a closer bond between Bacon and her father.
Following her role on The Closer, Sosie began studying at Brown University and has studied at musical theatre company CAP21. She joined the cast of Fiction in Photographs in 2012, an Off-Broadway musical by Dan Mills and Randy Redd.
On November 21, 2013, Sosie Bacon was crowned Miss Golden Globe 2014. Chosen each year by the Hollywood Foreign Press Association, Miss Golden Globe assists with the Globes ceremony and is typically the daughter of Hollywood celebrities. The outgoing recipient was Francesca Eastwood, daughter of Clint Eastwood and Frances Fisher. She was cast in the leading female role of the 2014 independent film Off Season opposite Chance Kelly.
While directing Loverboy, Kevin Bacon decided to cast his daughter Sosie in the film. Asked about the choice to cast his daughter, Kevin said he made the decision as a Director, not as a father, because he believed his daughter was perfect for the role and that "Sosie was cool. She kind of got it out of her system. She said, 'Oh, that was fun—now I’m going back to school.'" Sosie portrayed the main character Emily in a flashback, while the adult Emily was portrayed by her mother Kyra Sedgwick. As Emily, she sang an a cappella version of the David Bowie song "Life on Mars?" that was described in a review from The New York Times as "grotesquely funny." Her brother, Travis Bacon, was cast in a smaller role in the film. Kevin praised her work on Loverboy, but said he would not be encouraging her to pursue acting further.
Following up her role in 13 Reasons Why, Bacon has been cast in Here and Now, a 2018-debuting HBO family drama series from award-winning writer-producer Alan Ball, as Kristen, the youngest daughter of a couple played by Tim Robbins and Holly Hunter.
