Smosh is a web-based comedy duo consisting of Ian Hecox (born November 30, 1987) and Anthony Padilla (born September 16, 1987). Padilla first began posting flash movies on Newgrounds in early 2003, under the name Smosh. He was later joined by his friend Ian Hecox. Soon afterward they began to post videos on YouTube in the autumn of 2005 and became one of the most popular channels on that site, with more than 4.7 million subscribers as of May 2012.

Six Smosh-related channels exist on YouTube, though only four are very active. The base "Smosh" channel, where both Hecox and Padilla post their skits and other videos, has new videos every Friday. From "IanH" (used at first for vlogs and other non-scripted videos), the pair upload their side series "Ian is Bored" on Mondays and "Lunchtime with Smosh" on Thursdays, while their associate performer Mari does "Smosh Pit Weekly" videos on Saturday. On "ElSmosh", the duo uploads old episodes on Wednesdays and new episodes on Sundays that have been dubbed over in Spanish. "Shut Up! Cartoons" airs a number of animated series, created by different animators, it uploads videos on various weekdays. "AskCharlie", active from May 2010 to December 2011, hosts videos from the Ask Charlie series, where an anthropomorphic guinea pig, named Charlie the Drunk Guinea Pig, answers viewer submitted questions. "AnthonyPadilla", hosts vlog-like videos uploaded by Padilla, which are uploaded only rarely.

Ian M. Harding (born on September 16, 1986) is an American actor.

Harding was born in Heidelberg, Germany to a military family. His family moved to Virginia a few years later, where he joined the drama club at his high school, Georgetown Preparatory School. He was elected by his class to give the commencement address. He later went on to pursue the Acting/Music Theater program at the Carnegie Mellon University. He currently portrays Ezra Fitz on the ABC Family television drama series, Pretty Little Liars.

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Nina Dobrev (born Nina Constantinova Dobreva; January 9, 1989) is a Bulgarian-born Canadian actress and model. She played the role of Mia Jones, the single teenage mother, on Degrassi: The Next Generation, from the show's sixth to ninth season. She currently stars as Elena Gilbert and Katherine Pierce on The CW television teen drama, The Vampire Diaries.

Nina Dobrev was born in Sofia, Bulgaria, and moved to Canada at the age of two, where she was raised in Toronto, Ontario. She speaks fluent French, English, and Bulgarian. She has an older brother, Alexander; her father is a computer specialist and her mother is an artist.

Dobrev attended J. B. Tyrrell Sr. Public School, where she started ballet and jazz classes, and competed in rhythmic gymnastic. Then, she attended and Wexford Collegiate School for the Arts in Scarborough, Ontario and Ryerson University in Toronto, majoring in sociology. She left in 2008 to pursue her acting career.

While working on the show, she began dating her Vampire Diaries co-star Ian Somerhalder.

Ian Joseph Somerhalder (born December 8, 1978) is an American actor and model, best known for playing Boone Carlyle in the TV drama Lost and Damon Salvatore in the TV drama The Vampire Diaries.

Somerhalder was born and raised in Covington, Louisiana, the son of Edna, a massage therapist, and Robert Somerhalder, an independent building contractor. Raised Catholic, he attended St. Paul's, a private Catholic school in Covington. He embarked on a modeling career from age 10 to 13, and by the age of 17 he decided to go into acting.

In the summer of 2000, Somerhalder starred in the short-lived WB series Young Americans, a spin-off of Dawson's Creek. He played Hamilton Fleming, the son of the dean of a prestigious boarding school. In 2002, Somerhalder played bisexual character Paul Denton in Roger Avary's adaptation of Bret Easton Ellis' novel, The Rules of Attraction, alongside James Van Der Beek, Shannyn Sossamon, and Jessica Biel.

In 2004, Somerhalder scored his breakthrough role when he played Boone Carlyle in the hit TV show Lost. Despite his character's death in the twentieth episode of the first season, Somerhalder returned to the role of Boone for seven more episodes between 2005 and 2010, including the series finale. Somerhalder was the first actor to be cast in a role for the series and the first character to die.

Louis Jude "Lou" Ferrigno (born November 9, 1951)) is an American actor, fitness trainer/consultant, and retired professional bodybuilder. As a bodybuilder, Ferrigno won an IFBB Mr. America title and two consecutive IFBB Mr. Universe titles, and appeared in the bodybuilding documentary Pumping Iron. As an actor, he is best known for portraying the titular role in the CBS television series The Incredible Hulk and for voicing the character in subsequent animated and computer-generated incarnations. He has also appeared in European-produced fantasy-adventures such as Sinbad of the Seven Seas and Hercules, and as himself in the sitcom The King of Queens and the 2009 comedy I Love You, Man.

Lou Ferrigno was born in Brooklyn, New York to Victoria and Matt Ferrigno, a police lieutenant. He is of Italian descent. Soon after he was born, Ferrigno says he believes he suffered a series of ear infections and lost 75 to 80% of his hearing, though his condition was not diagnosed until he was three years old. Ferrigno started weight training at age 13, citing body builder and Hercules star Steve Reeves as one of his role models. He was also a fan of the Hercules films that starred Reeves—and would later play Hercules as well. Ferrigno's other personal heroes as a child were Spider-Man and the Hulk. Ferrigno attended St. Athanasius Grammar School and Brooklyn Technical High School, where he learned metal working.