Her mother, Andrea Boroff Eagan, was a medical writer; she died of cancer when her daughter was 13 years old.

[1] In 1991, Eagan won the Tony Award for Best Performance by a Featured Actress in a Musical for playing Mary Lennox in The Secret Garden.

[5] She appeared in the Blank Theatre Company's production of The Wild Party in 2005 in Los Angeles as the street waif,[6] and is the recipient of the 2005 LA Weekly Theater Award for Best Supporting Actress in a Musical.

[1] She appeared in the Manhattan Concert Productions presentation of The Secret Garden at David Geffen Hall in February 2016 as the housemaid Martha.

[16] Eagan attended Bard College at Simon's Rock and graduated from Antioch University in Los Angeles with a Bachelor of Arts in psychology and creative writing.