Trivia: Born July 29th, 1974, genial actor Josh Radnor established himself as a television star almost exclusively with one single, charming role: that of Ted Mosby, the young man whose future self (the voice of Bob Saget) narrates the story of how he snagged his wife and the mother of his children, on the sitcom How I Met Your Mother. That program earned stellar notices when it premiered in 2005, suggesting a lengthy run and newfound stardom for the young actor. Radnor's resumé also includes guest appearances on such programs as ER, Six Feet Under, and Law & Order.

Trivia: Born January 18th, 1980, the first decade or so of Jason Segel's career as a Hollywood actor, he spent his time earning cult-favorite status -- beginning with the jet-black comedy Dead Man on Campus (1998), then the NBC comedy drama Freaks and Geeks (1999). Segel subsuquently achieved broader recognition for his long-running performance as Marshall on the beloved sitcom How I Met Your Mother. He also played Jason in the big-screen feature Knocked Up (2007), Judd Apatow's uproarious follow-up to The 40-Year-Old Virgin. Fresh off his success in Knocked Up, Segel parlayed his newfound wide-scale popularity into the ultimate chance to showcase his skills, writing and starring in the side splitting romantic comedy Forgetting Sarah Marshall (2008), alongside Kristen Bell, Mila Kunis, and Russell Brand.The massively succesful film also featured a supporting performance by funnyman Paul Rudd, who reteamed with Segal for 2009's buddy comedy I Love You, Man. Having found a niche with audiences, the actor next picked up another tonally similar comedy, appearing with Cameron Diaz in the sharp witted, hard-R rated Bad Teacher in 2011. Later that same year, Segal showcased his talents on both sides of the camera yet again, writing the script for a reboot of Jim Henson's beloved Muppets, and starring in the film alongside the furry stars as well. As Segal geared up for 2012, he signed on to star alongside Emily Blunt in the romantic comedy A Five Year Engagement.

Trivia: Born March 24, 1974, in Washington, D.C., Hannigan became a TV commercial veteran following her family's move to Atlanta. From the age of four, Hannigan appeared in a steady stream of commercials, including ones for Oreo and McDonald's. At the age of 11, she moved to Los Angeles to pursue a career in film and television. She made her big-screen debut in the 1988 film My Stepmother Is an Alien, as Dan Aykroyd's daughter. The following year, she won a regular spot on the short-lived sitcom Free Spirit and acted in a variety of television miniseries and sitcoms (including Roseanne and Picket Fences) until 1997, when she won the part of Willow on Buffy.The show proved to be an unexpected success among critics and viewers alike, and paved the way for Hannigan to appear opposite Tom Everett Scott in the 1998 comedy Dead Man on Campus. American Pie followed the next year, giving Hannigan wider recognition and making her an unintentional poster child for band camps everywhere. She would return for sequels in the franchise, but Hannigan would also become just as well known for her subsuquent role on the popular sitcom How I Met Your Mother.

Trivia: Neil Patrick Harris made his first splash playing a 16-year-old doctor in the Steven Bochco television series Doogie Howser, M.D. (1989-1993). Following the series' demise, the young adult actor laid low for a few years, appearing in films like Starship Troopers and Shakespeare's Sister. Harris second act would come in 2004, however, when he played a hilariously insane, fictionalized version of himself for the stoner comedy Harold and Kumar Go to White Castle. Harris would follow this up with a starring role on the hugely popular, left of center sitcom How I Met Your Mother, playing beloved rake and ladies' man Barney.In addition to his film and television career, Harris has also had a successful career on-stage. In 1997, he wowed California audiences playing the lead in the popular off-Broadway musical Rent.

Trivia: Born April 3rd, 1982, model-turned-actress Cobie Smulders grew up in her native British Columbia and commuted regularly from Vancouver to Los Angeles while looking for assignments. Smulders reportedly secured a work visa thanks to her first major role: that of Robin, the charming TV reporter whom lead character Ted Mosby (Josh Radnor) falls in love with on their very first date, on the sitcom How I Met Your Mother (2005). Before that, she had been a regular on the adventure series Veritas: The Quest and had appeared several times on The L Word (both series were shot in Canada). Her resumé also includes minor feature appearances in the Chris Klein comedy The Long Weekend (2004, as Ellen) and the Rock-headlined actioner Walking Tall (2004, as the Exotic Beauty). The actress continued to find success with How I Met Your Mother, and appeared as Agent Maria Hill in 2012's blockbuster The Avengers.

Trivia: Fresh-faced Becki Newton became interested in acting at a young age, participating in local theater from the time she was a child. After graduating from UPENN and studying abroad, Newton began devoting her career to show business, acting in commercials and appearing on shows like Law & Order: Special Victims Unit and Charmed. In 2006, Newton married fellow actor Chris Diamantopoulos and the next year, she was cast in the hit series Ugly Betty, playing mean-spirited receptionist Amanda.

Trivia: Born in Puerto Rico, his parents were Canadian and moved the family back to Toronto when he was 13. Was a member of the high school swim team and student council. Enjoys collecting primitive art. Is a resident director at Theatre 40 in Beverly Hills. Established an acting scholarship at his high school. Is active in many charities, including Project Angel Food, the AIDS Project Los Angeles and the United Way.

Trivia: Shaved her head before her first day of middle school. Was in the original Broadway cast for the musical Once, which was based on the 2006 film of the same name. Unable to read music, she was given 10 days to learn two key songs, one classical and one contemporary, for Once. Featured in a Vogue magazine spread that photographically chronicled her preparations for the 2012 Tony awards, for which she was a nominee. Was introduced as the Mother in the 2013 Season 8 finale of How I Met Your Mother. To maintain secrecy while shooting her brief scene, all the extras were members of the series' production staff. Once played in a New York City band called Eelwax Jesus. Because of her unfamiliarity with Los Angeles street signs, received four parking tickets in her first week in the city.