Emily Jordan Osment was born in Los Angeles, California. Emily's mother Theresa is an English teacher. Her father, actor Michael Eugene Osment, has appeared in various films and was in Osment's movie Soccer Mom, and her older brother is the Academy Award-nominated actor Haley Joel Osment.
After working in several television films in her childhood, Osment co-starred as Gerti Giggles in Spy Kids 2: Island of Lost Dreams and Spy Kids 3-D: Game Over. Osment went on to co-star in the Disney Channel sitcom Hannah Montana as Lilly Truscott as well as the series movie, Hannah Montana: The Movie.
She also starred as Cassie in R. L. Stine's: The Haunting Hour Volume One: Don't Think About It and most recently the Disney Channel Original Movie, Dadnapped as Melissa Morris.
Osment ventured into pop music and more recently alternative/indie rock where she has recorded pop hits like "I Don't Think About It," "If I Didn't Have You" alongside her Hannah Montana co-star Mitchel Musso, and most recently "Once Upon a Dream."
Osment's debut album, Fight or Flight was released on October 5, 2010 via Wind-up Records, and it features lead single "Let's Be Friends" which was released July 7, 2010.
Emily Osment sang vocals in Billy Ray Cyrus's song "You've Got a Friend" from his 2007 album Home at Last. Osment has also recorded a song entitled "I Don't Think About It" for The Haunting Hour Volume One under the label Hatchery, for which she shot an accompanying music video. The video was released in The Haunting Hour DVD and premiered on Cartoon Network.
"I Don't Think About It" hit number one on the Radio Disney top three in July 2009. Osment also recorded a remake version of the song "If I Didn't Have You" with Mitchel Musso for the DisneyMania 6 CD.
Osment also recorded a song, released in 2008, with "The Disney Channel Circle Of Stars." Osment recorded a remake of "Once Upon a Dream" for the release of Sleeping Beauty 50th Platinum Edition. She also recorded a song called "Hero in Me" for Dadnapped.
Besides singing, Emily plays acoustic guitar, electric guitar and drums.