Julianna Rose Mauriello (born May 26, 1991; Irvington, New York) is an American actress. She starred in LazyTown, and has appeared in various Broadway musicals. Mauriello has performed in a series of shows, including Gypsy: A Musical Fable, starring alongside Bernadette Peters, and A Tree Grows in Brooklyn. Her first appearance on Broadway was during the 2002–2003 run of Oklahoma!.

She played the character of Stephanie on LazyTown, filmed in Iceland. Her performances in the program earned her a nomination for a 2006 Daytime Emmy Award for "Outstanding Performer in a Children's Series."

Mauriello was an honor student at the Professional Performing Arts School. She has appeared in commercials and voiceovers, and is an avid dancer, taking classes in ballet, jazz, tap and Irish stepdancing. She has also been involved in gymnastics. Mauriello is able to speak Icelandic, from her time spent in Iceland on the set of LazyTown.

In 2006, Mauriello appeared, as herself, in the direct-to-video film Hip Hop Kids: Hip Hop Homeroom Math. She was cast as the leading role of Pyper in the short film A Fix.

Mauriello resides in New York City.

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