Zachary Adam Gordon (born February 15, 1998) is an American film and television teen actor, best known for playing Greg Heffley in the Diary of a Wimpy Kid films which are based on Jeff Kinney's #1 New York Times best seller Diary of a Wimpy Kid.

Gordon was born in California, to Linda and Ken Gordon. He has two siblings, Josh and Kyle, and was raised in Southern California. He is Jewish, from a practicing family, and attends a public middle school in Oak Park, California.

Gordon's résumé includes many television appearances, such as All of Us and How I Met Your Mother. He has also appeared in the 2008 opening of Desperate Housewives, and 24, which aired in January 2009.

His film credits (2007–2008) include Sex and Death 101, Lower Learning, the Garry Marshall film Georgia Rule (for which he won the "Young Artist Award" for his portrayal of Ethan), The Brothers Bloom, as Young Bloom, and alongside Nicolas Cage in National Treasure: Book of Secrets (2007). Gordon has been credited with numeous voice-over roles including "Brad Spolyt" in The Chubbchubbs Save Xmas, "Ricky Garcia" in Project Gilroy, "San San" in Nick Jr.'s Ni Hao, Kai-Lan and The Mighty B! He is a series regular as the voice of Gil, one of the lead roles in the Nickelodeon series, Bubble Guppies. Gordon has voice acted as Baby Melman in the animated film, Madagascar: Escape 2 Africa, Kotaro in Afro Sumurai: Resurrection, and Young Tony Stark in The Super Hero Squad Show. In 2010, he played Greg Heffley in the film Diary of a Wimpy Kid, and in 2011 appeared as Papi Jr. in Beverly Hills Chihuahua 2.

Robert Capron (born July 9, 1998) is American child actor who is best known for starring as Rowley Jefferson, Greg Heffley's best friend in the Diary of a Wimpy Kid movies. He started off with a role in Bride Wars and later had small parts in Hachiko: A Dog's Story and the Disney film The Sorcerer's Apprentice. His mother, Kaye Capron, played his character's mother in Diary of a Wimpy Kid. Capron lives in Scituate, Rhode Island.

Bailee Madison (born October 15, 1999) is an American child actress. She is most famous for her role in Bridge to Terabithia in which she plays May Belle Aarons, the younger sister of Jesse Aarons. She films a webshow with her babysitter and fellow actress, Samantha Droke. Madison also starred in the horror film Don't Be Afraid of the Dark as Sally Hirst, and appeared in the Adam Sandler film Just Go With It. Her elder sister, Kaitlin Riley, is also an actress.

Madison was born in Fort Lauderdale, Florida, the youngest of seven children. She began her career when she was two weeks old in an Office Depot commercial. Since then, she has appeared in several national commercials for major companies including Disney, SeaWorld, and Cadillac. She also serves as a national spokesperson for the childhood-cancer charity Alex’s Lemonade Stand. Bailee has stated that she is a Christian.

She made her major motion picture debut in the movie Lonely Hearts, in which she plays Rainelle, a girl thrown into the midst of a world of crime. Madison also has a significant role in the Disney movie Bridge to Terabithia, based on the children's book. She plays May Belle Aarons, the younger sister of the lead male character played by Josh Hutcherson. She also appears independent film Look as Megan, a girl who is being watched and followed by a kidnapper.

Diary of a Wimpy Kid is a 2010 American comedy film directed by Thor Freudenthal and based on Jeff Kinney's book of the same name. The film was released on March 19, 2010 (September in Australia). It was released on DVD, iTunes, and Blu-ray on August 3, 2010.

11-year-old Greg Heffley (Zachary Gordon) is anxious to start middle school, confident he will easily become the school's most popular kid. However, Greg worries about how his "uncool and embarrassing" best friend, Rowley Jefferson (Robert Capron), will fit in. While Rowley is a good friend who helps Greg escape his terrorizing older brother, Rodrick (Devon Bostick), Greg worries that Rowley's "dorky" clothes and personality will embarrass both of them.

On their first day, Greg and Rowley meet Angie Steadman (Chloë Moretz), a seventh grader who works for the school's paper. Throughout the school year, Angie gives Greg and Rowley information about the workings of middle school, which she believes was created to store kids while they make the awkward transition between children to teenagers. Classmate Chirag Gupta (Karan Brar) tells Greg and Rowley the story behind the moldy slice of Swiss cheese laying on the school's basketball court; upon touching the cheese, a kid named Darren Walsh (Harrison Houde) contracted the Cheese Touch and caused the 1st Cheese Touch Apocalypse ; anyone who touches the cheese will create chaos and they pass on the Cheese Touch by touching someone else. The Cheese Touch eventually got taken away by a German exchange student named Dieter Müller, who moved back to Düsseldorf over the Summer and took the Cheese Touch with him.

Devon Bostick (born November 13, 1991) is a Canadian actor, best known for playing the lead role in the Atom Egoyan-directed film Adoration and Rodrick Heffley in the Diary of a Wimpy Kid movies.

Bostick was born in Toronto, Ontario. His mother, Stephanie Gorin, is a casting agent in Toronto, working in stage and screen, and his father, Joe Bostick, is an actor as well as a film fight coordinator. Devon began acting when in grade five. He is a graduate of the Etobicoke School of the Arts in Toronto. He has had roles in the TV series Degrassi: The Next Generation, Flashpoint (TV Series) and in the film Citizen Duane. His film work has included roles in Godsend,Fugitive Pieces and The Stone Angel. In Adoration he plays Simon, a boy who is being raised by his uncle (played by Scott Speedman) after his parents' death. He also appears in an online spoof trailer for a hoax movie called "Ice Fortress".

He had roles in The Poet, a World War II drama starring Roy Scheider and Colm Feore, Saw VI as Brent and Assassin's Creed: Lineage as Ezio Auditore.