She began with commercials and made her way to the big screen with the School of Rock in 2003. However, she did not become a household name until she got her big gig with Nickelodeon.
She starred as Megan Parker on Drake & Josh from 2004 to 2007 and as Carly in iCarly from 2007 to 2012.
2004 to 2012 was Cosgrove's era. She was a beloved celebrity among children and earned accolades like the Young Artist Awards and one Kids' Choice Award.
In 2012, Guinness World Records listed her as the highest-paid child actress of the year for her role in iCarly, where she was earning $180,000 per episode.
With the help of iCarly, Cosgrove also released music that peaked charts on Billboard.
After almost a decade, the actress reprised her role as Carly in the revival of iCarly. The revival premiered on June 17, 2021, on Paramount+. It was a massive success, and as a result, Paramount+ renewed it for season 2.
