Trivia: The quiet yet dynamic screen presence of actor Joe Mantegna has made him one of the most powerful supporting actors in Hollywood. Born in Chicago, Mantegna made his acting debut in the 1969 production of Hair. He then joined Chicago's Organic Theatre Company. In 1978, he debuted on Broadway in Working; he also helped write Bleacher Bums, an award-winning play. Still, he did not become well-known until he played a recurring role on the TV show Soap. By 1983 he'd returned to Chicago, where he began working with playwright David Mamet. While playing the lead in Mamet's play Glengarry Glen Ross (1983), Mantegna won a Tony. When Mamet began making films, Mantegna became his actor of choice in works such as House of Games (1987) and Homicide (1991). Prior to that, the actor had played small roles in a number of other films. He also continues to play in a variety of movie genres, working with some of Hollywood's top directors. Mantegna turned producer in 1998 with the crime comedy Jerry and Tom. That trend continued on the small screen as Montenga produced such shows as Midway USA's Gun Stories, Shooting Gallery, and QuickBites, but it was his role as a regular on the CBS series Joan of Arcadia that really kept him in the public eye. Continually returning to his recurring role as Fat Tony on The Simpsons over the next decade, Montegna joined the cast of the hit television series Criminal Minds in 2007, and recieved an Emmy nomination for his performance in the successful mini-series The Starter Wife that same year.

Trivia: Versatile as well as tall, dark, and handsome, Thomas Gibson has moved easily between TV stardom and a varied movie career working with some of the industry's major names. Born and raised in Charleston, Gibson found his calling as a child, making his acting debut at age ten in children's theater productions. Though he attended the College of Charleston, Gibson relocated when he won a scholarship to New York's prestigious Juilliard School. After earning his B.F.A., Gibson made his professional New York theater debut in 1985. Gibson spent the rest of the 1980s doing theater, as well as branching out into television with two seasons on the daytime drama Another World and the TV movie Gore Vidal's Lincoln (1988).Gibson made the transition to films in style with a co-starring role opposite Tom Cruise and Nicole Kidman in Ron Howard's glossy Irish-American epic Far and Away (1992). Along with playing a bit part in Martin Scorsese's lush The Age of Innocence (1993), Gibson further distinguished himself that year with larger roles in the critically praised PBS miniseries Armistead Maupin's Tales of the City and French-Canadian director Denys Arcand's first English-language film, the contemporary drama Love and Human Remains (1993).Gibson subsequently appeared in the second part of Whit Stillman's preppy trilogy, Barcelona (1994), and in the indie Sleep With Me (1994), but he became better-known to TV audiences that year on the CBS hospital drama Chicago Hope. After three seasons on the show, Gibson became an even more prominent TV presence in 1997 when he was cast as the straight-laced husband Greg to Jenna Elfman's hippie Dharma on the ABC sitcom Dharma and Greg. In addition to the memorable role of Greg, Gibson would appear in a number of feature films, like Eyes Wide Shut, The Flintstones in Viva Rock Vegas, and Psycho Beach Party, as well as subsuquent TV series, like the the proceedural Criminal Minds.

Trivia: California-born Shemar Moore parlayed a successful modeling stint into an acting career that began in 1994 with a lead role on the soap opera The Young and the Restless. Moore played Malcolm Winters for eight years, and earned a Daytime Emmy for his performance in 2000. After leaving The Young and the Restless, Moore landed a role on the short-lived WB superhero series Birds of Prey. A prominent supporting role in the surprise hit Diary of a Mad Black Woman followed in 2005, and that same year, he was cast on the CBS drama Criminal Minds alongside Mandy Patinkin and Thomas Gibson. In 2007, Moore made headlines in the gossip rags for a DUI arrest. He would go on to star on the proceedural Criminal Minds.

Trivia: Las Vegas native Matthew Gray Gubler got his show-business start as a fashion model, working for designers like Tommy Hilfiger. After graduating from NYU's Tisch School of the Arts in 2002, Gubler appeared in his first feature film, playing one of the interns in The Life Aquatic with Steve Zissou in 2004. He soon followed that performance with a starring role in the series Criminal Minds, playing the young genius Dr. Spencer Reid. He also made a small appearance in the comedy RV before signing on to appear in The Great Buck Howard. He had a major supporting role in (500) Days of Summer, but has probably had his largest success voicing the part of Simon, the nerdy member of the rodent trio at the heart of three Alvin and the Chipmunks movies.

Trivia: Canadian-born A.J. Cook trained as a competitive dancer before beginning her acting career at age 17 in the children's TV series Goosebumps. She started out in small roles on made-for-TV dramas until her first big break as one of the blonde Lisbon sisters in The Virgin Suicides. She went on to a recurring role on Higher Ground, a Fox Family Channel series about teens in boot camp, where she played the love interest of fellow Canadian Hayden Christensen prior to his role of Anakin Skywalker in Star Wars: Episode II -- Attack of the Clones. After another TV movie and the snowboarding comedy Out Cold, Cook found her niche as a lead actress in horror movies with Ripper: Letter From Hell in 2001. She then headlined a number of other thrillers, including Wishmaster 3: Beyond the Gates of Hell, The House Next Door, and Final Destination 2. In 2005, she began her run in the series Criminal Minds, playing special agent Jennifer "JJ" Jareau. Cook took on a supporting role in the romantic comedy I'm Reed Fish in 2006, and starred in director Ron Satlof's comedy Misconceptions in 2008. The actress took another lead role in 2011 for Bringing Ashley Home, a docudrama following a woman (Cook) determined to find her sister when she suddenly goes missing. Cook returned to the horror genre in 2013, with Wer. A member of the Mormon church, Cook lives in Salt Lake City, UT, with her husband, Nathan Andersen.

Trivia: Like a lot of showbiz hopefuls, Kirsten Vangsness has had her share of day jobs. After paying the bills as a substitute teacher, child counselor, and dinner-theater actress, Vangsness found her big break when she was cast in a Pepsi commercial. Soon afterward, she scored the role of Penelope Garcia on the hit show Criminal Minds in 2004. She made her feature film debut in the thriller In My Sleep.

Trivia: Personifying the type of teen spirit most commonly found in Noxzema ads and pep squad meets, actress Jennifer Love Hewitt has brought new meaning to the word "effervescent." The 1990s saw Hewitt go from relative obscurity to a bona fide teen queen, to say nothing of one of the most frequently enshrined actresses on the Internet.Hewitt was born on February 21, 1979 in Waco, TX. She made her first appearance on television in 1984 in the show Kids Incorporated (which, coincidentally, once guest-starred Scott Wolf, her Party of Five co-star). She also did a multitude of commercials, even doing a stint as a LA Gear spokesgirl at the age of ten. After spending the majority of the 80s working in television, Hewitt got her first film role in the 1993 film Sister Act 2: Back in the Habit, but it wasn't until she got her big break as Sarah Reeves on Party of Five (1994) that she began to gain recognition. More recognition came, first in the form of Trojan War (1997), and then from I Know What You Did Last Summer (1997). The film, which capitalized on the growing trend in teen horror flicks catalyzed by Wes Craven's Scream (1996), proved to be immensely popular among audiences, if not critics. It was predictably followed by a sequel, the aptly titled I Still Know What You Did Last Summer (1998). In addition to her film work, which also included 1998's Can't Hardly Wait, Hewitt maintained her role in Party of Five and continued to star in commercials, most notably as the Neutrogena spokesgirl.

Trivia: Something many fans of Greg Grunberg may have noticed is that the actor has appeared in a noticeably large number of projects by producer J.J. Abrams. This is because Grunberg and Abrams, in fact, grew up together and remained friends. His first big break came when his friend set to work on a one-hour dramedy called Felicity. Grunberg was cast in the role of Sean Blumberg -- a role he would continue to play for all of the show's four-year run. His next notable part came when he assumed the recurring role of Agent EricWeiss on the spy show Alias. He then popped up in the Abrams pilot for the series Lost, as the pilot of the crashed airplane, before joining the cast of the wildly popular sci-fi series Heroes as police officer Matt Parkman, whose superhuman power is that he is able to hear other people's thoughts.

Trivia: Like many New York actors, Martin Kove was willing to go unbilled to pick up extra paychecks in such East Coast-filmed efforts as Little Murders (1971) and Last House on the Left (1972). By 1984, Kove was pulling down third billing in such films as The Karate Kid, wherein he played Kreese, the "bad" karate expert who trained the film's principal heavy William Zabka for his bout against the simon-pure Ralph Macchio (Kove replaced Chuck Norris, who turned down the role of Kreese because he didn't want karate trainers to be shown in an unsympathetic light). Martin Kove's work on series TV has included the roles of detective Victor Isbecki on Cagney and Lacey and an extraterrestrial named Jesse on Hard Time on Planet Earth.