Officer Carl (
Christopher Michael) is a police officer that appeared in
"iWant More Viewers" and
"iMove Out". He is shown to harbor ill will towards Spencer due to a mishap where a sign he created for iCarly short-circuited and read the phrase "Pee on Carl". Aspartamay (
Jack Black) is Spencer's online video game rival in
"iStart a Fan War". He and Spencer come face-to-face at Webicon. Pam Puckett (
Jane Lynch) is the mother of Sam Puckett and her sister Melanie. Pam appears only in
"iSam's Mom" and "iShock America P1. She was frequently mentioned throughout the first three seasons, but had never been seen in person. Krustacia (
Irina Voronina) is Spencer's date in the episode "iSell Penny Tees". She is a foreign woman from Uzbekistan. She speaks no English, so Spencer has to use hand motions to communicate with her. Gordon Birch (
J. D. Walsh) and Jodi Flooger (Rakefet Abergel) are a couple from Milwaukee, Wisconsin, who only appear in the episode "iDo". The iCarly gang helps the couple with Gordon's proposal and their wedding. Jeb Birch (
Joe Dietl) is the brother of Gordon Birch. He feels angry and jealous towards Freddie. This is due to Gordon choosing Freddie as his best man for his wedding instead of him. Harper (
Leon Thomas III) is the leader of the band that played in "
iCarly Saves TV". He played the piano on the TV show and sang a song on guitar on the webshow. Greg Horvath (
Kevin Symons) is the CEO of the DAKA Shoe Company (also mentioned in
Drake & Josh) in "
iPromote Techfoots". Mario (
Jim Pirri) is an Italian immigrant who works at Galini's pie shop. His only appearance was in "
iPie". Trudy Galini (Wendy Haines) is the granddaughter of Mr. Galini, seen in the episode "
iPie". She is very awkward, weird, and seems to lead a depressing life. Trudy has a major crush on Spencer. The iCarly gang wants Spencer to go on a date with her because they believe that she knows the secret recipe to Mr. Galini's pie. Shelby Marx (
Victoria Justice) appears only in "
iFight Shelby Marx". She is the youngest champion in the CFC and becomes a friend of Carly, Sam and Freddie. She challenges Carly to a friendly exhibition boxing match, but is tricked by Nevel into going hard on her. Ginger Fox (
Betsy Rue) only appears in "
iFix a Popstar". She is a parody of singer
Britney Spears. She was once a Pop Music Award-winner. Shadow Hammer (
Aaron Aguilera) is a criminal who appears in "
iSam's Mom". Chip Chambers (
Jacob Bertrand) is the more menacing younger brother of Chuck Chambers. Mrs. Papperman (Wendy Braun) is Nevel's mother. She is only seen in "
iNevel," in which she forced Nevel to remove a bad review he wrote about iCarly. The Dorfmans (Dalton O'Dell, Shane Partlow, Casey Williams, and Stephanie C. Allen) are Carly's dorky cousins whom she despises due to them being uncontrollably annoying. Kyoko and Yuki (
Ally Maki and
Harry Shum, Jr.) are two Japanese webstars whom iCarly competed against in
iGo to Japan. They attempted to ruin iCarly's chances of winning the iWeb Awards by stranding them in the middle of nowhere. Mystery Girl is a little girl (Anna Clark) who appears in "
iSpace Out". She arrives at Spencer and Carly's apartment while Carly is away at space camp. Spencer wonders if she is real or an illusion. Gunsmoke (Anthony Vitale) is a bodyguard who appears in "
iSam's Mom". Mrs. Benson hires him to protect Freddie when she worries about the Shadow Hammer hurting him. He served in three military wars and has a hole in his leg the size of his thumbnail. His name is taken from the
Western drama series of the same name. Marta Trundel (
Kit Pongetti) is Lewbert's former girlfriend. Carly, Sam, and Freddie try to reunite Marta and Lewbert to put an end to Lewbert's attitude in "
iFind Lewbert's Lost Love", only to find out that he broke up with after 5 weeks because of her abusive and obsessive behavior. Wade Collins (Alex Schemmer) is a British-Canadian aspiring singer whom the iCarly gang volunteer to boost his career after they unintentionally sabotage his chances on
America Sings. Off-camera, he is shown to be obnoxious, rude and short-tempered. He hates puppies and lied about his mother needing surgery to gain sympathy from the public. He frequently refers to Americans as "hobknockers". Doug Toder (
Daniel Samonas) is Spencer's old archrival who only appears in "
iFence". He challenged Freddie to a fencing competition, only to be beaten by him and Ms. Benson. Veronica (
Valerie Azlynn) was Spencer's date in "
iMake Sam Girlier", but their relationship happened only because she liked his
tuxedo. She returns in "
iEnrage Gibby", to express condolence when she thinks Spencer is dead. Detective Stuart 'Spanky' Stimbler (
Ryan Bollman) is a childhood bully of Spencer who only appears in "iStakeout". His nickname "Spanky" refers to the fact that he likes to spank unsuspecting people as a joke. Tasha (
Emily Ratajkowski) is Gibby's girlfriend. She had a minor role in "
iSpeed Date" and a major role in "
iEnrage Gibby". Multiple characters are surprised that she and Gibby are dating.+ Harry Joyner (
Oliver Muirhead) is Spencer's idol who influenced his art and appears in "
iHeart Art". Upon meeting Spencer for the first time, he tells him that he doesn't like his sculptures, which depresses Spencer and causes him to give up on his art career and become a Dentist. He later admits that he was jealous of his work, and he and Spencer team up to make a sculpture for the Dentist office he temporarily worked at. Amber Tate (
Rachel G. Fox) is a spoiled child actress that appears in "
iCarly Saves TV", in which she is rude to the iCarly gang. She has a small dog who frequently vomits. Granddad Shay (
Greg Mullavey) is a lawyer and Carly and Spencer's paternal grandfather who lives in
Yakima, Washington. In his debut episode, "iWanna Stay With Spencer", he tries to take Carly away from Spencer on the grounds that he is not mature or responsible enough to take care of her. Col. Steven Shay (
David Chisum) is Carly and Spencer's father who is a Colonel in the United States Air Force. He has appeared in a few episodes, but has mostly been stationed on a base in Italy. In the final episode, Carly left Seattle to stay with him in Italy. Amanda "Mandy" Valdez (
Aria Wallace) is an obsessed fan of iCarly and only appears in "iAm Your Biggest Fan" and "iWant My Website Back". Griffin (
Drew Roy) is a bad boy that Carly dates in "
iDate a Bad Boy". He steals Spencer's motorcycle, and upon being arrested, Spencer refuses to press charges and takes him under his wing in an attempt to reform him. Carly ends up breaking up with him after learning he collects
Pee Wee Babies. Sasha Striker (Lorena York) is the world's best Pak-Rat (parody of
Pac-Man) player who appeared in "
iStage an Intervention". Jackson Colt (Terrell Lee) is a top 10
MMA fighter who appears only in "
iLook Alike". Hazel (Sherry Weston) is an elderly woman that Gibby met while riding down the street on his bike in "
iDo". She assists him in retrieving a five-dollar bill that he spotted in a tree, but only after Gibby promises her they will get coffee afterwards. She helps him get the bill by letting him on her shoulders, but she falls down and Gibby drives off with the bill. Cal (
Jake Siegel) was Carly's assistant in
"iGo Nuclear". He was helping her with a school science project for her teacher, Mr. Henning. Cal was actually a criminal because he had a history of building illegal nuclear projects using
black market uranium. Mitch (
Danny Woodburn) appears in "
iChristmas". He is the guardian angel who granted Carly's wish for Spencer to become normal. He teaches Carly a valuable lesson in an attempt to gain his wings, which turns out to be
chicken wings. (
Jennette McCurdy) is Sam's
identical twin sister who appears in "
iTwins". According to Sam, she is a straight "A" student, follows all the rules, and goes to a fancy
boarding school in Blandale,
Vermont. Fleck and Dave (Daven Wilson and
Joey Luthman) are two teenage boys who cohost a web show and appear in "
iQuit iCarly". The two are good friends but have very different opinions on how the show itself is written. Cort and Ashley (
Daniel Booko and
Teresa Castillo) are two teenagers hired as interns in the episode "
iHire An Idiot". Steven Carson (
Cameron Stewart) is Carly and Tori's ex-boyfriend on "
iParty with Victorious". Adam (
Max Ehrich) is Carly's love interest in "iStart a Fanwar." He attendeds Webicon in the episode. He is upset with the rumors that Carly and Freddie are dating by the shippers. Goopy Gilbert (Jeremy Dozier) is an extreme Seddie fan best known for shouting "SEDDIE!" He is first seen in "iStart a Fanwar" as a Seddier in the crowd. In "iLost My Mind", he is the second video chatter debating whether or not Sam and Freddie should be together. He loves spaghetti and his bedroom is decorated with pictures of Sam and Freddie. LeAnne Carter (Gilland Jones) is Sam's former rival when they competed in beauty pageants. She has won many beauty pageants. Despite Sam disliking her, LeAnne is actually kind to Sam and others. Emily (Piper Mackenzie Harris) is a little girl and a Sunshine Girl scout. She is extremely shy. Spencer offers to help her sell fudgeballs so she can win a bicycle. Spencer does this partially so he can get closer to her single mother. Roy (Malcolm Devine) is a security guard working for the Seattle Museum of Art. In "iHire an Idiot," Roy kicks Spencer out of the museum since he snuck his sculpture inside. Spencer then has Gibby distract Roy so that he can sneak his sculpture back into the museum for display. ==Guest appearances==