Trivia: Australian actor Jesse Spencer launched his career with a long stint (from the mid- to late '90s) on the popular Aussie soap opera Neighbours, playing Billy Kennedy. He followed that up with a number of key supporting roles in acclaimed features, such as that of Marwood de Whichehalse in Mike Barker's R.D. Blackmore adaptation Lorna Doone (2001) before signing on for the lead in Russell Mulcahy's inspirational drama Swimming Upstream (2002). That picture -- about a young man destined to become a champion swimmer despite the setbacks thrown into his path by an abusive father (Geoffrey Rush) became a small-scale hit and earned favorable reviews. After a turn in the Brittany Murphy vehicle Uptown Girls (2003), Spencer landed one of his greatest achievements when he signed on to play Dr. Robert Chase on the Fox medical drama House, and the series quickly became a hit. Offscreen, Spencer made headlines for his romantic involvement with House co-star Jennifer Morrison (Dr. Allison Cameron). The two -- who reportedly met on the set of House -- became engaged during the 2006 holidays.

Trivia: Was a star volleyball player in high school and was named Section Two Volleyball Player of the Year in Pennsylvania. Studied business management in college. Big break came when he was cast as a regular on Fashion House in 2006. Appeared in Lady Gaga's 2011 music video "You and I." Played the recurring role of werewolf Mason Lockwood on The Vampire Diaries. Participated in the Chicago Polar Bear Plunge, which raises money for the Special Olympics, in 2015.

Trivia: Born in London to Grenadian parentage, distinguished actor Eamonn Walker acquired a deep-seated interest in drama at the age of 9, when he witnessed Sidney Poitier acting; the experience helped the young man perceive drama as a powerful tool to change individual lives. Walker began his professional life in repertory theater by touring across United Kingdom and tackling roles in smaller regional productions, then formally honed his craft in South London's Albany Empire. Thereafter, Walker unveiled an ability to seamlessly segue between portrayals of African Americans, West Indians, and Africans. He first bowed in front of the camera in the early '90s, but came into his own around the tail end of that decade as the deeply conflicted Muslim/black nationalist Kareem Said on all six seasons of HBO's harrowing prison drama Oz (1997-2003). That marked a watershed assignment that opened up the floodgates to many others, including a small contribution to M. Night Shyamalan's sci-fi thriller Unbreakable (2000), a turn as Baptiste Senior in director Andrew Niccol's political thriller Lord of War (2005), and an uncanny portrayal of blues legend Howlin' Wolf in the period ensembler Cadillac Records (2008). In 2006, Walker drew from his theatrical roots -- and made more than a few headlines -- with a Broadway performance opposite Denzel Washington in Julius Caesar.

Trivia: Began performing with the Sarasota Youth Opera and in various theater productions at age 7. Raised on a sailboat for most of his childhood. Was named on VH1's 2012 list of TV's Most Promising Eye Candy. Spent two weeks preparing for his role in Chicago Fire by going on ride-alongs with real firefighters and learning the ropes at a Chicago fire station.

Trivia: Best known as Steve, the boyishly charming nice-guy bartender (and the perfect complement to his onscreen romantic partner, snappish Miranda Hobbes) in HBO's blockbuster original series Sex and the City, the slightly diminutive, raven-haired American character actor David Eigenberg was born in Manhasset, NY, on May 17, 1964. As the only boy in a family of six children, Eigenberg moved with his parents and sisters at age four to Naperville, IL, a farming community just outside of the Windy City -- where he remained through the end of adolescence. Eigenberg reportedly struggled as a student, barely scraping by; a handful of run-ins with the law and minor recreational drug abuse allegedly ensued. Eigenberg did graduate from Naperville High School in 1982, however, and was promptly accepted to the University of Iowa, where he planned to study social work. For better or worse, this was not to be, for the Chicagoan ripped his dormitory apart during the first semester and was promptly booted out of the university after five weeks.A stint in the Marines and various construction jobs followed, instilling in Eigenberg healthy amounts of much-needed self-discipline and a sharply honed work ethic. These skills paved the way for Eigenberg's true calling: acting. A love of the dramatic arts had already taken root for the thespian when -- at age 12 -- he had signed on to play a key role in a local production of Kurt Vonnegut's Happy Birthday, Wanda June, and received an outstanding review from a local critic. These fond memories doubtless came flooding back when an adult Eigenberg auditioned -- and was selected for -- a large part in the Dennis Rosa-directed Chicago stage musical One Shining Moment, opposite Megan Mullally and Alan Ruck. Dissatisfied with a mere taste of the theatrical arts and eager to extend acting into a full-time passion, Eigenberg subsequently moved to New York and attended the American Academy of Dramatic Arts, working odd jobs on the side (construction et al.) to put himself through school.Scattered roles followed, including a guest appearance on The Cosby Show and a bit part in the awful 1989 generation-gap comedy Rude Awakening (co-starring Cheech Marin and Eric Roberts), but Sex and the City (which Eigenberg auditioned for out of innumerable hopefuls) represented the actor's first huge break. He reportedly auditioned for a small part, and though the show's producers did not deem him right for the characterization, they felt so impressed by Eigenberg's presence that they created the character of Steve Brady especially for him, as an extension of his own personality; the plan, again, was to create a sincere, committed, down-to-earth male paramour to offset Miranda's (Cynthia Nixon) cynicism.Though initially intended as a temporary part, the popularity of the character among viewers (and Eigenberg's onscreen chemistry with Nixon) led to Eigenberg's permanent inclusion on the show, as well as subsuquent movies.Circa 2002, Eigenberg expanded into film roles by playing the business partner of Richard Gere in Mark Pellington's underrated supernatural thriller The Mothman Prophecies. When Eigenberg's Sex and the City run ended with the wrap-up of that series (at the end of the 2003-2004 season), he continued his cinematic work, first voicing Nermal the Cat in the FX-extravaganza Garfield: The Movie, then playing Reggie, the lover of Alicia Goranson's Myra, in Adrienne Weiss' quirky indie romantic comedy Love, Ludlow. Eigenberg returned to the same genre amid a cast of unknowns with the 2007 film The Trouble with Romance, directed by Gene Rhee. He reprised his role in the Sex and the City movie in 2008 and the sequel in 2010. In 2012, he joined the cast of NBC's Chicago Fire, playing a firefighter in the Windy City.

Trivia: Raven-haired Lauren German made her film debut with a small appearance in the 2000 comedy Down to You. She paid her dues over the following years with minor roles in A Walk to Remember, The Texas Chainsaw Massacre and Hostel: Part II. A much more prominent part came in 2011, when German was cast in the role of Lori Weston on the TV remake of Hawaii Five-0.

Trivia: Actress Monica Raymund learned as much as she could about her craft before getting a serious start on her professional career, graduating from the Juilliard School in New York and participating in Ann Reinking's Broadway Theatre Project for three years. When she decided to pursue an on-screen career, Raymund had little trouble getting started, snagging the role of tough-talking Ria Torres on the crime drama Lie to Me. When Lie to Me ended its three-season run in 2011, Raymund made the seamless transition to the CBS drama The Good Wife, in which she played the character of Dana Lodge.

Trivia: A slightly tough and weathered character actor who specialized in playing gruff, domineering types (including guards, Mafiosos, and authoritarian fathers), Christian Stolte debuted onscreen in the early '90s and went on to distinguish himself with bit parts in films including Novocaine (2001), Road to Perdition (2002), and Stranger Than Fiction (2006). On the small screen, Stolte took on the recurring role of C.O. Keith Stolte during the first two seasons (2005-2007) of the cult series Prison Break. Back on the big screen, he received unusually prominent billing with his wry comic turn as a Mafia hitman assigned to rub out his cousin, in the character comedy Osso Bucco (2007).

Trivia: Is half-Georgian, half-Armenian; moved to the United States at age 2. Appeared in The History Boys at the Timeline Theatre in Chicago in 2009, while he was still attending college. Prepped for his role in Chicago Fire by doing ride-alongs with the Chicago Fire Department. Shared an apartment with Chicago Fire castmates Charlie Barnett and Joe Minoso during the show's first season.

Trivia: Was named the associate artistic director for Teatro Vista in Chicago in 2009. Appeared in the Goodman Theatre's production of A Christmas Carol in the 2011-12 season. Had a memorable recurring role on the Starz series Boss where his character's ears were cut off. Shared an apartment with his Chicago Fire castmates Yuri Sardarov and Charlie Barnett when the show was first picked up.

Trivia: Like a lot of girls born into the upper-middle-class suburb of Pasadena, CA, Sophia Bush caught a whiff of the Hollywood air just down the road and took an interest in acting at an early age. After getting her feet wet in school plays at the Westridge School for Girls, she graduated in 2000 and enrolled at the University of Southern California, where she majored in journalism and minored in theater. It was that minor interest that proved to be her greatest passion, however, and in 2002, at the age of 20, she scored her first movie gig with a small role in National Lampoon's Van Wilder.Another onscreen role would follow in 2003, and a much more substantial one. Bush was cast as sassy cheerleader Brooke Davis in the WB series One Tree Hill. She left school to work full-time on the series, which paid off when One Tree Hill proved to be a huge hit. In addition to the professional success that the show brought her, the program also featured Bush's onscreen romance with co-star Chad Michael Murray -- which soon turned into a real-life love affair. The two were wed in 2005, but unfortunately, the union was not to last. After just five months, the two separated and eventually divorced, though they remained co-stars on the series. Bush took the personal hit in stride, continuing to act in additional projects such as Supercross: The Movie and the popular 2006 comedy John Tucker Must Die. Bush also proved to have a knack for tense and scary subject matter, from a recurring part on the series Nip/Tuck to a starring role in the 2006 horror flick Stay Alive. In 2007, she appeared in an even bigger horror movie as the female lead in a remake of The Hitcher, starring opposite veteran actor Sean Bean. While building up her impressive acting resumé, Bush still didn't lose the interest in journalism that she pursued in college, working as an assignment editor for Annenberg TV News when she wasn't on-set.Bush returned to TV in the short-lived sitcom Partners before playing the recurring role of detective Erin Lindsay on Chicago Fire. Her character was part of the planned 2014 spin-off, Chicago P.D.

Trivia: Actor Edwin Hodge resisted being typecast and pigeonholed, and felt equally at home in projects representing a myriad of genres, from frat-boy comedies (National Lampoon Presents: Dorm Daze) to period epics (The Alamo) to teen-oriented thrillers (All the Boys Love Mandy Lane). Hodge (the brother of actor Aldis Hodge) debuted in the early 2000s, signing for one of his first jobs with a supporting role in Victor Nuñez's fine, overlooked ensemble drama Coastlines (2002), and at around the same time made guest appearances on such series as Angel and Touched By an Angel. In 2004, he appeared on the critically praised but short-lived series drama Jack & Bobby; he then tackled roles in the telemovie Fighting the Odds: The Marilyn Gambrell Story (2005) and the teen drama Debating Robert Lee (2006).

Trivia: Was a member for the Remains Theatre Ensemble for 15 years and made her directorial debut there. Has been a member of Steppenwolf Theatre since 1997. Made her Broadway debut as Nurse Ratched (opposite Gary Sinise as Randall P. McMurphy) in One Flew Over the Cuckoo's Nest in 2001. Played Barbara in the original production of August: Osage County in Chicago in 2007, and transferred with the show to Broadway later that year. Her first leading role was in the 2013 indie film Bluebird.