Trivia: Though she was only 17, by the time Hayden Panettiere gained stardom as one of the leads on NBC's hit superhero drama Heroes, she'd already been acting for more than 16 years. After appearing in television commercials beginning at 11 months old, flaxen-haired Panettiere was cast as a regular on One Life to Live at five. She remained on the show for three years, before leaving for a stint on another soap, Guiding Light. Meanwhile, she appeared in a number of small movie parts as well as one of the lead voices in Pixar's A Bug's Life. After Panettiere showed up in such films as Remember the Titans and Joe Somebody, her next notable role was Maddie Harrington, the long-lost daughter of the quirky title character on Fox's Ally McBeal. Along with supporting parts in Raising Helen and Racing Stripes and the lead in the second straight-to-DVD Bring It On sequel, several more small TV roles followed before 2006, when she was cast on Heroes as the cheerleader with the ability to spontaneously heal herself. A major hit with television viewers, Heroes was nominated for Emmy awards every year from 2006 through 2010 -- ultimately taking home a trophy for Best Visual Effects in 2009. After Heroes went off the air in 2010, Panettiere seemed determined to show her versatility by taking on the role of a convicted murderess in the made-for-TV movie Amanda Knox; Murder on Trial in Italy, returning to vocal work as Little Red Riding Hood in Hoodwinked Too! Hood vs. Evil, and appearing as a successful young pop star in the 2012 ABC drama Nashville.

Trivia: Traveled a lot as a child because her parents worked for Qantas Airways. From age 4 until age 7, she battled a rare form of cancer. Starred in several Australian TV series, including Home and Away, All Saints, The Cut and Chandon Pictures. Was considering pursuing a teaching degree as a backup career plan when she was cast in her first film, The Combination (2009). Portrayed the female lead in Spring Awakening at the Sydney Theatre Company. Said that learning to do an American Southern accent for Nashville wasn't too difficult for her.

Trivia: Graduated from the College of William and Mary with a degree in economics. Moved shortly after college to Los Angeles to learn comedic improv at the Groundlings Theater. Made his theatrical debut in the United Kingdom in the musical Buddy, where he played the lead role of Buddy Holly and performed for Queen Elizabeth. Originally appeared in the British version of Whose Line Is It Anyway?; he later moved to become a regular in the US version. Tours through the United States with the improv group called Whose Live Anyway?; the group is made up of him and of his former Whose Line Is It Anyway? cast mates. His son Chase took Esten's Nashville TV daughter Lennon Stella to his senior prom.

Trivia: Began considering a career in show business at 9 years old, when his family took a vacation to Universal Studios. Grew up in Washington state, but moved to Los Angeles in his teens to pursue acting. Sings lead vocals in the rock band Enation. Self-published a book of poetry called Book of Solace and Madness. Is politically active and has publicly supported Republican presidential candidates George W. Bush and Mike Huckabee.

Trivia: Studied theater and music in college. Is a singer-songwriter for a British folk bank, Salt Water Thief. An original cast member of Dreamboats and Petticoats, a popular musical that tours through the United Kingdom. Has been known to perform at Kevin Spacey's bar called Pit Bar, which is located above The Old Vic Theater in London.

Trivia: Dropped out of college when he was discovered by a modeling scout. Has appeared in more than 50 commercials. Took acting lessons at the Stella Adler Studio in New York. Plays blues and jazz style saxophone and guitar. Has modeled for brands like Guess? and Abercrombie & Fitch. Appeared in a 2002 production of The Lost Poems of Tennessee Williams at the Laurelgrove Theatre in Los Angeles. Was a recurring character on ABC's Nashville during season 1 before being promoted to a series regular for season 2.

Trivia: Parents perform as a country music duo under the name The Stellas. Became a celebrity when a video she posted on YouTube singing the Robyn song "Call Your Girlfriend" with her sister became a viral hit. Plays guitar, the piano and the ukulele. Relocated with her family from Canada to Nashville in 2009. Appeared in a commercial for Dan McGuinness Irish Pub.

Trivia: Was named after John Lennon. Parents perform as a country duo called The Stellas. Became a celebrity when a video she posted on YouTube singing the Robyn song "Call Your Girlfriend" with her sister became a viral hit. Plays guitar, ukulele, piano and the drums. Relocated with her family from Canada to Nashville in 2009. Went to senior prom with her Nashville TV dad's real-life son Chase.

Trivia: Fell in love with acting in the sixth grade after appearing in his middle school production of Fiddler on the Roof. A talented singer-songwriter, he formed bluegrass band The Whiskey Collection with friends from Juilliard and released album Letters From an Old Trunk in 2013. Had recurring roles on both Nashville and Shades of Blue in the spring of 2017.

Trivia: Coming from a long line of filmmakers going back to her great-grandparents producer George Bilson and writer Hattie Bilson, Rachel Bilson rose to fame almost immediately after entering the acting game. After only a handful of TV guest roles, she landed a recurring part on Fox's hit teen soap The O.C. in 2003 and was soon bumped up to regular cast member. She'd stick with the series until it ended its run in 2007, but in the meantime, she appeared in feature films like the 2006romantic drama The Last Kiss. Bilson would then go on to appear in films like the fantasy themed action movie Jumper, and the sentimental romance Waiting for Forever. In 2011, Bilson returned to the small screen with a leading role on the comedy/drama series Hart of Dixie.

Trivia: With her pretty blonde tresses and million-dollar smile, American actress Kaitlin Doubleday seemed a natural for on-camera talent, and launched her acting career during her late teens. Doubleday made a highly auspicious feature film debut as Joanna, one of the many (many) beautiful girls bedecking the cast of Steven Spielberg's Frank Abagnale biopic Catch Me if You Can. A romantic lead in Ryan Shiraki's gender-bending teen comedy Freshman Orientation followed, but marked something of a step backward, receiving as it did extremely limited theatrical distribution and a long-delayed U.S. video release. In 2005 and 2006, respectively, the actress essayed supporting parts in the workplace comedy Waiting and the teen comedy Accepted. She also signed for a very brief turn in Jake Kasdan's media satire The TV Set (2006), starring David Duchovny, and portrayed the romantic lead in the short-lived 2007 sitcom Cavemen, ostensibly a pointed commentary about race relations based on the famous Geico commercials. Though that show folded fairly quickly, Doubleday continued to work extensively in television, with guest spots on shows like Bones and CSI. Her next series regular role proved to be a smash, starring in the hit series Empire, playing Rhonda, the wife of eldest son Andre.

Trivia: An alumnus of Eastern New Mexico University, American actor Ronny Cox received one the best early film showcases an actor could ask for. In 1972, he was cast as one of the four unfortunate rafters in Deliverance; it was Cox who engaged in the celebrated "dueling banjos" sequence with enigmatic albino boy Hoyt J. Pollard. Two years later, Cox found himself in Apple's Way, a homey TV dramatic weekly described as a "modern Waltons". Most of his subsequent roles were in this benign, All-American vein--and then Cox shocked his followers by portraying Jerry Rubin in the 1975 PBS TV drama The Trial of the Chicago Seven. During this telecast, Cox became one of the first (if not the first) actors to mouth a now-familiar expletive of disgust on American television. As his physique thickened and his hairline thinned in the 1980s, Cox was much in demand in films as a corporate villain, notably in Paul Verhoeven's Robocop (1984) and Total Recall (1990). The flip side of this hard-nosed screen image was his portrayal of the apoplectic but scrupulously honest police chief in Eddie Murphy's Beverly Hills Cop films.

Trivia: Musician, dancer, and actress Mía Maestro studied the arts in Argentina until the age of 18, when she moved to Berlin for further vocal training and was able to add the works of classical German composers to her singing repertoire along with further acting and dance experience. At 20 years old, Maestro traveled back to Buenos Aires, where she won an ACE award for her performance in a theatrical production of Pandora's Box. In 1998, she made her feature-film debut in Tango, in which she played an aspiring dancer who becomes entangled in a romance with a film director. Just one year later, Maestro traveled to Austria, where she was able to work with Lauren Bacall and Dennis Hopper in The Venice Project (1999). Ultimately, however, she would move to Los Angeles and shortly thereafter earn a supporting role in Timecode (2000) alongside Salma Hayek, with whom she would work again in 2002's Frida. In 2003, Maestro was able to play a much larger role in Walter Salles Jr.'s road movie The Motorcycle Diaries, which premiered at the 2004 Sundance Film Festival. After a small role in Ben Stiller's Duplex (2003), Maestro accepted another supporting role in Lucrecia Martel's coming-of-age drama La Niña Santa (2004). Also in 2004, Maestro appeared in a recurring role on the popular television spy drama Alias, playing the newly discovered younger sister of main character Sydney Bristow (Jennifer Garner).