During the auditions, Kaya Scodelario, who was 14 at that time, claimed to be 16 on the forms to get herself noticed. She later felt that she was too young for the show and was about to leave. But a producer told her to stay and encouraged her to read for the part of Effy.
In one episode, JJ performs a "magic trick" by blowing fire. As soon as the flame bursts out, you can see (and hear) the reactions of Cook, Effy and Freddie. According to Ollie Barbieri, the reactions of Luke Pasqualino and Jack O'Connell, even the scream of Kaya Scodelario, were all genuine. It was told to them that there will be a fire-blowing scene, but it won't be real. What they didn't know was that Ollie Barbieri would actually blow fire.
Many people think Effy is the only character to appear in 4 seasons, (or 2 generations) but the characters Pandora Moon, Anthea and Jim Stonem (Effy and Tony's parents) the teacher, Doug and Eric all reoccur.
While filming the lake scene of the episode Skins: Naomi (2009), Kathryn Prescott went into a hypothermic shock after jumping in, because the temperature of the water was really cold. The scene was actually planned to be longer, with Emily and Naomi playing around in the water, but the scenes didn't get made because of that.
The show's pattern to change from a teenage drama with comedy elements to a more serious coming-of-age drama is intentional. In each generation, the first season introduces the characters, while the second season focuses on their psyche.
This show coined the term "Skins Party", which was mostly contributed by news outlets reporting about several house parties that have been celebrated in a vaguely similar fashion as in the show. One particular incident occurred in County Durham during the 2007 Easter holidays, where a girl posted an invitation to a "Skins Unofficial Party" on her MySpace page (which she claimed was hacked). This resulted in two hundred people arriving at her house, causing about £20,000 of deliberate damage during the course of the party. In 2008, official Skins parties were introduced in several clubs in Britain, which where often called "Skins Secret Parties".
Nicholas Hoult (Tony) and Sean Teale (Nick) have both played X-Men, with Hoult playing Hank McCoy/Beast in X-Men: First Class (2011), X-Men: Days of Futures Past, & X-Men: Apocalypse (2016), and Teale playing Marcos Diaz/Eclipse in The Gifted (2017-).
On several occasions in Skins: Sketch (2008) and in one scene in Skins: Michelle (2008), Sketch is singing. This is Aimee-Ffion Edwards's actual singing voice. In fact, Edwards is a talented singer and was a runner-up in the Welsh music talent show Wawffactor (2003) several years prior.
The trivia items below may give away important plot points.
While having sex with Sketch, Anwar lists Hugh Grant movies from the 90's and up. Right after he climaxes he states: I never get past "About a Boy". In fact, "About a Boy" stars Nicholas Hoult, one of the series main cast.
One character from all of the three generation dies. In Generation 1, Chris dies from Subarachnoid Hemorrhage. In Generation 2, Freddie is beaten to death by Effy's psychotic counselor. In Generation 3, Grace dies from her coma after being in a car crash. In Skins Redux, Naomi gets terminal cancer and it is implied that she will die shortly after the episode, however, nothing is revealed.
It remains unclear if the name of Aimee-Ffion Edwards' character, Sketch, is either her nickname or her surname. Everyone calls her like that, except her mother, who calls her "Lucy". Although it hasn't been confirmed, many people believe that her full name might be Lucy Sketch.
Every season features a gay character. In season 1&2 it's Maxxie, Season 3&4 it's Emily and Naomi, Season 5 it's Franky's parents and then in Season 6 it's Alex. This is to show that being Gay is normal and common while teenagers grow up. The same reason that someone dies ever two season.
A family member either dies or has already died in each generation. In generation 1, Sid's dad passes away. In generation 2, you learn that Freddie's Mum has already died. In generation 3, Alex's grandmother dies in bed. Then, in Skins: Pure, you find out that Cassie's Mum has passed away. This is to show that death is a part of life.