Melanie also made an appearance in Does Jennette McCurdy Have a Twin Sister? The answer is no. It’s an honest mistake to think the American actress has a twin sister seeing that Sam Puckett, the character she portrays on iCarly.
Jeanette Mccurdy herself had a Jennette Michelle Faye McCurdy (born June 26, ) [1] is an American writer, filmmaker, former actress, and singer. Her breakthrough role as Sam Puckett in the Nickelodeon sitcom iCarly (–) won her four Nickelodeon Kids' Choice Awards.
Jennette.fandom.com › wiki › Melanie Puckett is a character on Sam & Cat and the identical twin sister of Sam Puckett. She appears to be nicer and kinder than Sam is. Melanie also made an appearance in an episode of iCarly. On Sam & Cat, she appeared in #Twinfection. Like Sam, she is portrayed by Jennette McCurdy.
Portrayed By. Jennette McCurdy. Melanie Jennette McCurdy does not have a twin in real life. She is the youngest of four children and she has three older brothers. People often wonder if Jennette McCurdy has a twin IRL probably because she portrayed fictional twins Melanie and Sam Puckett in Sam & Cat. Now let’s have a look at Jennette’s family life.
The answer is no.
Jennette McCurdy plays Sam and her twin. It's just a camera trick. They take a shot of Jennette as Sam then another shot of Jennette as Melanie (her sister) then they combine the shots. 
Carly Shay ; Jennette Melanie Puckett (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 show and appear in "iQuit iCarly". The.
Sam Puckett ; Ariana Jennette Faye McCurdy (born June 26, ) is an American former actress, producer, screenwriter and singer-songwriter. She starred as Sam Puckett in the popular Nickelodeon TV series, iCarly and Sam & Cat until the shows ended in and , respectively. She has also guest starred in a number of other television series, including Malcolm in the Middle, Zoey , Will and Grace, Strong.
Jennette Michelle Faye McCurdy (born iTwins is the 23rd episode of the second season of iCarly and the 48th episode overall. The episode originally aired on July 11, Jennette McCurdy portrays a dual role in the episode as both her regular character Sam and as Sam's previously unknown twin sister, Melanie. After Freddie is teased for being very gullible (he receives an email from Carly and Sam and dresses up as a clown.