Miranda Taylor Cosgrove was born May 14, 1993 in Los Angeles, California, to Christina (Casey) and Tom Cosgrove, who owns a dry-cleaning business. She was discovered at a young age singing and dancing around a table in a restaurant, where an agent saw her talent and quickly signed her. Miranda's career started with commercials for Burger King, McDonalds and more as she auditioned for many roles and finally won her first role as the band's manager in the movie, School of Rock (2003).

While filming School of Rock (2003) in New York, she was informed that her pilot Drake & Josh (2004) had been picked up. She co-starred as Drake and Josh's little sister, while making brief appearances on other Nickelodeon shows, before landing in her own show for the network, iCarly (2007). Her iCarly (2007) popularity helped her launch a singing career, and she was named an MTV Pop Rookie for 2009. Her debut album, "Sparks Fly", was released in 2010 and reached #8 on the Billboard 200 chart, along with two EPs: "About You Now" in 2009, and "High Maintenance" in 2011.

While continuing her singing career, Miranda has expanded upon her voice-over work for the children's movies, including Here Comes Peter Cottontail: The Movie (2005), and the Despicable Me (2010) films and related shorts, as well as expanding her film work with Yours, Mine & Ours (2005), Keeping Up with the Steins (2006) and The Wild Stallion (2009). Her TV reach has extended beyond Nickelodeon, with an appearance on the CBS legal drama The Good Wife (2009) during the show's second season. She has served as a spokesperson for Neutrogena skin care products since 2010.

She lives in Los Angeles with her family.