Barely Lethal received 22 reviews on Rotten Tomatoes .
The film was released in the United Kingdom on August 28 , 2015 in select cinemas and was released through video-on-demand and on DVD and Blu-ray on October 26 , 2015 by Signature Entertainment. On Rotten Tomatoes , the film holds a rating of 24 % and an average rating of 4.2 out of 10 .