艾米莉·奧斯蒙特的生日是1992年03月10日，出生于Los Angeles, California。
艾米麗·奧斯蒙特是史上最經典童星之一的海利·喬·奧斯蒙特小四歲的妹妹，他們的父親Eugene Osment也是一位小有名氣的演員，曾和海利·喬一起出演過《人工智慧》。延續著他們的足跡，艾米麗從幾則電視廣告開始了表演生涯，1999年拍攝首部影片《辣妹成熟時》，隨後在電視電影《Sarah, Plain and Tall: Winter's End》中出演了格倫·克洛斯和克里斯托弗·沃肯的女兒，為此獲得了年輕藝術家獎的一項提名。接下來，艾米麗在電視劇《3rd Rock from the Sun》、《Touched by an Angel》以及《六人行》等當中客串了一些小角色，同時也同她的哥哥一起為動畫短片《Edwurd Fudwupper Fibbed Big》配音。之後的艾米麗參加了兩次重要的試鏡並且贏得了角色，首先是《非常小特務2》的導演對於艾米麗的表現非常滿意而決定將她在片中的戲份加重，同時卻對於她是某位著名表演天才的妹妹的事實一無所知，本片和隨後的《非常小特務3》的小演員們都在年輕藝術家賞中獲得了提名；另一次競爭激烈的試鏡便是迪斯尼熱門兒童劇集《Hannah Montana》，講述擁有當紅歌手Hannah Montana和不受歡迎的女中學生Miley Stewart的雙重身份14歲女孩的故事，艾米麗出演的則是Hannah Montana的狂熱粉絲以及Miley Stewart最好的朋友Lily Truscott一角。
是 Eugene Osment 和Theresa Osment女兒.
她喜歡 The Beatles, Led Zeppelin, and Modest Mouse.
很喜歡赫本，尤其是她的"Breakfast at Tiffany's".
她喜歡的電影有Bringing Up Baby, Tootsie, and The Sound of Music.
最喜歡的動物 dwarf owl.
與 'Hannah Montana'中 Mitchel Musso.是好朋友
在Billy Ray Cyrus's 歌中"You've Got A Friend"也唱過.
"It's a long way away, but I wanna do this till I die." (on acting)
"I'm not so great at keeping secrets, maybe that's why no one ever tells me things." [on keeping secrets]
"I'm trying to follow in my brother's footsteps, because I know he's really talented. I'm just trying to be like him I think." [on her brother Haley Joel Osment]
"My brother gives me lots of tips. He tells me, 'Look them in the eye! Don't daydream!' It really helps me a lot." [on the help her brother gives her]
"Seriously, I did not want to see The Sixth Sense. I knew I would have nightmares. And my parents agreed with me, too. I'm just too young. I haven't seen it yet. I still think it's scary. I don't like scary movies." [on her brother's hit movie]
"I love Audrey Hepburn. I thought she was very classy. I like Breakfast at Tiffany's and a lot of her movies." [On her favorite actress.]
"I'm a soccer fanatic, so I'm very competitive. I'm always ready to play, and I'm always asking, 'Why isn't everyone ready to play?'"
"Disney Channel is celebrities coated in sugar. Everything is really happy; everything is really bright."
Dadnapped (2008) (TV) (in production) .... Melissa Hamilton
Soccer Mom (2008/I) (post-production) .... Becca
"Hannah Montana" .... Lilly Truscott / ... (47 episodes, 2006-2007)
- I Will Always Loathe You (2007) TV episode .... Lilly Truscott
- Bye Bye Ball (2007) TV episode .... Lilly Truscott
- Lilly's Mom Has Got It Goin' On (2007) TV episode .... Lilly Truscott
- That's What Friends Are For? (2007) TV episode .... Lily Truscott
- Don't Stop Til You Get the Phone (2007) TV episode .... Lilly Truscott
The Haunting Hour: Don't Think About It (2007) (V) .... Cassie
"Shorty McShorts' Shorts" .... Kelly / ... (2 episodes, 2007)
- Mascot Prep (2007) TV episode (voice) .... Tall Skunk Girl
- She Zow (2007) TV episode (voice) .... Kelly
Holidaze: The Christmas That Almost Didn't Happen (2006) (V) (voice) .... Trick
Lilo & Stitch 2: Stitch Has a Glitch (2005) (V) .... Additional Voices
... aka Lilo & Stitch 2 (USA)
Spy Kids 3-D: Game Over (2003) .... Gerti Giggles
... aka Spy Kids 3: Game Over (USA: video title)
Spy Kids 2: Island of Lost Dreams (2002) .... Gerti Giggles
... aka Spy Kids 2: The Island of Lost Dreams (USA: video box title)
"Friends" .... Lelani Mayolanofavich (1 episode, 2001)
- The One with the Halloween Party (2001) TV episode .... Lelani Mayolanofavich
"Touched by an Angel" .... Alyssa (1 episode, 2000)
- With God as My Witness (2000) TV episode .... Alyssa
Edwurd Fudwupper Fibbed Big (2000) (voice)
"3rd Rock from the Sun" .... Dahlia (1 episode, 1999)
... aka 3rd Rock (USA: promotional abbreviation)
... aka Life As We Know It
- Dick, Who's Coming to Dinner (1999) TV episode .... Dahlia
Sarah, Plain and Tall: Winter's End (1999) (TV) .... Cassie Witting
The Secret Life of Girls (1999) .... Miranda Aiken