Has appeared in 20 different operas singing in five languages.

Made her stage debut at seven years of age (she sang "Happy Birthday" for her audition) at the New York Metropolitan Opera. She made $5 a night singing with the children's choir. According to her, "There were horses onstage that were getting $150".

Attended the Spence School in Manhattan, an elite private girls' school that was also attended by Gwyneth Paltrow and Kerry Washington.

Has celiac disease, an autoimmune disease in which the body can't tolerate any foods containing gluten or wheat.

She is a fan of Audrey Hepburn. She played the teenage Hepburn in The Audrey Hepburn Story (2000).

In preparation for her role in The Phantom of the Opera (2004), she attended a séance at the Spiritualist Association of Great Britian, where a medium talked to her about her late grandmother.

She obtained her high school diploma online via a Stanford University program.

Had never seen the stage version of The Phantom of the Opera (2004) prior to filming the screen version.

Took cooking classes at Le Cordon Bleu in London.

Won Best Young Actress in 2004 Critic's Choice Awards

Gave birth to her first child, a daughter born on May 24, 2021 at 8:13 AM.

Currently a spokesperson with a series of public service announcements for "Pinkitude.com", a breast cancer awareness website. (January 2009)

By marriage, is a cousin to world-famous fashion designer Vera Wang via Vera's husband Paul Becker.

Emmy Rossum's given name is Emmanuelle, derived from the first name of her great-grandfather Emmanuel.

Her father has English and Dutch ancestry. Her mother's family is Russian Jewish.

(May 28, 2017) Married her boyfriend of 3 years Sam Esmail following a 2-year-long engagement. This is her 2nd marriage.

Best friends with Leighton Meester, the actress and budding singer.

At the age of seven, Emmy Rossum joined the Metropolitan Opera Children's Chorus.

Her favorite actors are Sean Penn (her Mystic River (2003) co-star) and Miranda Richardson (her The Phantom of the Opera (2004) co-star).

Her favorite opera is "Carmen".

Worked with Justin Chatwin on both Dragonball Evolution (2009) as characters who are friends, and then in Shameless (2011) (2011-2015) as characters who are lovers.

Received a Barbie Doll made in her likeness in 2015 as part of Mattel's Sheroes Collection. It is a one-of-a-kind doll that was never mass produced.

In 2013, Emmy Rossum's song collection "Sentimental Journey" topped Billboard's Jazz Albums chart.

Emmy Rossum has worked with both of her favorite actors; Sean Penn in "Mystic River" and Miranda Richardson in "Phantom of the Opera."

Her father is a banker and her mother is a corporate photographer.

She auditioned for the role of Sue Storm in Fantastic Four (2015) before Kate Mara was cast.

Is very close friends with singer/actress Ashlee Simpson.

Studied acting with Flo Salant Greenberg of the Actor's Workshop in New York City for several years.

For her audition for the Metropolitan Opera Children's Chorus, Emmy Rossum performed "Happy Birthday."

Gave birth to a daughter on May 25, 2021.

Mother was Steve Jobs' personal photographer.

Was ranked #48 on Maxim magazine's Hot 100 of 2010 list.

Currently taking classes at Columbia University in the City of New York (December 2004)

Currently recording a pop album for Geffen Records [April 2006]

Her favorite designer is Ralph Lauren.

Currently filming Dare (2009), a full-feature film from the Short Film of the same name (can be seen on "Logo"). (May 2008)

Supported Hillary Clinton in her campaign for presidency in the 2016 American election.

Campaigning for Kamala Harris in the 2024 American presidential election.

Born on the same date as Alfie Allen.

Strongly dislikes the republican political party and has little interest in working with that vote for its politicians.