She was innate within Spring Valley, New York on June 8, 1966, the youngest of ternion girl. Her father is an advertising writer, & her mother occurs as previous dancer by using a American Ballet Theatre. As a toddler, she sleep in New York, France and England. Although her parents were Jewish, Margulies' mother converted to Roman Catholicism at some point in her life & raised Julianna in the Catholic faith as well. She found the B.The. from either Sarah Lawrence College, where she appeared inside campus in many plays. Her number one moving-picture show role was as a harlot seeking to last straight, in the Steven Seagal film Out for Justice.

Around 1994 she landed a role in the pilot episode of ER, as a character world health organization attempted suicide, despondent on top her relationship by having George Clooney's character. Due to audience response, a plot was changed, & she went in to play a role of Nurse Hathaway for sextet years, winning an Emmy nomination every season she was on a indicate, & the award itself for her foremost year's performance.

She turned down a $27 milliin offer to remain the hit indicate, which would stand manufactured her one of the right-paid actresses on television. Since her departure, she has worked regularly in stage & screen. inside stage she has appeared in Kate Robin's Intrigue With Faye, the Lincoln Center production of Jon Robin Baitz's Ten Unknowns, and The Vagina Monologues. Her film act since ER includes Evelyn with Pierce Brosnan and Ghost Ship with Gabriel Byrne.