Benz was born inPittsburgh.[3] Her mother, Joanne Marie (née Seemiller), was a figure skater, and her father, George Benz, Jr., is a surgeon in Pittsburgh.[4] Benz is of German and Welsh descent.[5][6]
When Benz was 14, she suffered a stress fracture in her right leg and had to take time off from skating.[7] The following year, at age 15, Benz says she was told by an acting coach that she would never succeed as an actress. "I remember the teacher telling me I should not even try acting. I still have the report card where she was like, 'You will never be an actor. Your voice is horrible.' That was the best thing that ever happened to me because I was like, 'I'll show you'," she later said.[8]
By 1989, with her figure skating career over, Benz became involved in local theater and was cast in the playStreet Law. Her first film role was a small speaking part in "The Black Cat" segment of theDario Argento/George A. Romero horror filmTwo Evil Eyes (1990).[9] A year later, she was cast in the TV showHi Honey, I'm Home! (1991),[2] which was cancelled after two seasons.
After graduating from New York University in 1993,[7] she moved toLos Angeles. Two weeks after her move, she obtained a bit part in a 1994 episode ofMarried... with Children, playing a girl who wanted to lose her virginity toBud Bundy.[8] Her subsequent roles included an unairedAaron Spelling television pilotCrosstown Traffic. She starred in another unaired TV pilot calledEmpire in 1995. Her other TV shows includedHang Time,High Tide,Step by Step, andBoy Meets World, plus a small role in the television filmThe Barefoot Executive.
During the 1990s, her acting career was varied and steady. She had an uncredited role inBlack Sheep and her appearance inDiagnosis: Murder as top figure skater "Julie" allowed her to demonstrate her skating talent. Later TV appearances included characters onSliders andThe Single Guy. She played Christy in the television filmHearts Adrift and a lead role as Julie Falcon inDarkdrive.
In 1996, Benz auditioned for the role ofBuffy Summers for the television seriesBuffy the Vampire Slayer, but lost the role toSarah Michelle Gellar. However, she was offered the small role of the vampireDarla, in the pilot episode. Her performance was so well-received that her part was expanded to a few more episodes.
This role helped launch her career and Julie appeared in guest appearances in more TV shows such asThe Big Easy andFame L.A., along with a small role as a receptionist in the filmAs Good as It Gets (1997). She starred in the short spoof filmEating Las Vegas and the unaired TV pilotVeronica's Video, had a small uncredited role in the television filmA Walton Easter, and a small role inInventing the Abbotts.
In 1998, she had a recurring role as Joplin Russell in the TV showAsk Harriet, then guest starred on bothConrad Bloom andThe King of Queens. She made two films, the dark comedyJawbreaker andDirt Merchant, before landing a lead role in the TV seriesPayne, an American remake of the British sitcomFawlty Towers. It was cancelled after eight episodes had aired.
Benz reprised her role asDarla in 2000 for theBuffy the Vampire Slayer spin-off seriesAngel,[10] appearing in every season for at least one episode. Julie was a guest host for the TV showRendez-View, cast as Ellie Sparks inGlory Days and appeared in the unaired pilot; however, she left the show. Later, she guest-starred onShe Spies, was in the featured cast for the miniseriesTaken, did various voices for the video gameHot Shots Golf Fore!, appeared in the short filmThe Midget Stays in the Picture, and took over the role of Ursula forGeorge of the Jungle 2.
Benz in 2009
Benz appeared inPeacemakers,Coupling,NCIS, andOliver Beene. She landed the lead role of Annie Garrett in the television filmThe Long Shot[10] and provided the voice ofMiranda Keyes for the video gameHalo 2, though she did not return to the role in the sequelHalo 3, as Bungie wanted to try a new direction with the Miranda Keyes voice by giving the character an accent.[11] She portrayed Danielle in the direct-to-DVD filmBad Girls from Valley High in 2005. She had a small role in the critically acclaimed television filmLackawanna Blues.
She played the title role in the short filmKidnapping Caitlynn, written by her close friendJenny Mollen, which premiered at the Vail Film Festival 2009 and was released online April 6, 2009.[13] She starred in the television filmHeld Hostage as Michelle Estey.[14] in July. She also starred in the television filmUncorked (2009)[15] as Johnny Prentiss[16] which premiered in the UK in July 2009. She is the lead female character Special Agent Eunice Bloom inThe Boondock Saints II: All Saints Day which had a limited release on October 30, 2009, and was released on DVD March 9, 2010. She has been cast in anotherindie film calledBedrooms as Anna.[17] She played Frankie in the 2011 filmAnswers to Nothing.
Benz appeared onThe Soup withJoel McHale. Benz next took a recurring role onDesperate Housewives as Robin Gallagher, a stripper with a heart of gold and a master's degree in education who gets offered the chance to transition into a more legitimate career.[18] The character of Robin is further developed when the audience discovers she is alesbian and begins an affair with housewifeKatherine Mayfair (Dana Delany).[19] After the fourth season finale ofDexter, in which her character is murdered, Benz returned for the fifth-season premiere in a flashback scene.[20]
In early 2010,ABC announced that Benz had landed a lead role as Stephanie Powell in the network's drama pilotNo Ordinary Family.[21] Production of the series commenced in May and it premiered in September 2010,[22] as part of the 2010–11 season.[23] In May 2011No Ordinary Family was cancelled after one season with only 20 episodes filmed.
In 2011, she was cast in the new CBS TV showA Gifted Man. Originally a co-star, she was later downgraded to a recurring role.[24]A Gifted Man was cancelled by CBS in May 2012 after one season of 16 episodes. She was cast in the television filmRicochet as Elise Laird.[25] Benz played the lead female role, Mayor Amanda Rosewater, in the science fiction seriesDefiance[26] and also starred in the filmSupremacy[27] and the unaired TV pilotMiddle Ages.
In 2015, Benz landed a recurring role in the CBS seriesHawaii Five-O, playing the latest team member and Chin Ho's girlfriend, Abby Dunn. She also starred in the television filmCharming Christmas.
In 2021, she guest-starred in the TV seriesLove, Victor.