Career: A few bit parts in comedy series were to be Hank's first roles, but it was his voice that earned him the attention of The Simpsons' bosses; he has provided his vocal talents for the iconic show since its launch in 1989. Azaria's comedy credentials earned him roles in Pretty Woman and Point Blank. He would give a memorable performance in Robin Williams' The Birdcage, playing a Guatemalan cleaner named Agador Spartacus. He also had a small cameo in Along Came Polly in 2004, guested on Friends and was seen in British comedy Run Fat Boy Run, as well as Mystery Men, Godzilla and Night at the Museum 2. Azaria has four Emmys to his name and a reputation as being one of the most talented and versatile actors in the business.

Career: Neil's first big break came in 1989 when he landed the lead role as a teenage doctor in comedy drama Doogie Howser, MD. When the show ended in 1993 after four seasons, Neil took up stage acting. He continued to make guest appearances in various TV shows, but he didn't hit the small-screen jackpot again until 2005 when he was cast as Barney Stinson in popular sitcom How I Met Your Mother (HIMYM). HIMYM ran for nine seasons, clocking up more than 200 editions. More recently, Neil has starred on the big screen in The Smurfs (2011) and its sequel The Smurfs 2 (2013), The Muppets (2011) and American Reunion (2012). He won two Emmy Awards in 2010 for a guest appearance in an episode of Glee and for hosting the 63rd Annual Tony Awards. He also won Emmys for hosting the 65th and 66th Tony Awards.

Career: Gleeson's classical acting skills gained the attention of Mel Gibson and he was cast in Braveheart (1995). Since then he has been in a huge variety of films, such as Mission: Impossible II (2000), Lake Placid (1999), The General (1998) and Gangs of New York (2002). He proved his was in the A-league when he was cast in the Harry Potter films and has several leading man roles to his name, including the popular crime caper, In Bruges.

Career: In 2007, Katy signed to Capitol Music Group, changed her name to Katy Perry and released her first single, Ur So Gay, online. The departure from her gospel roots attracted some attention, but it was second single I Kissed a Girl that catapulted her to fame. She scored a number one across the world, and follow-ups Hot N Cold and Thinking of You, from the album One of the Boys, were also big hits. Her second album Teenage Dreams was released in 2010 and its lead single California Gurls also went to number one. She made her film debut voicing a Smurfette in The Smurfs (2011) and reprised her role in the 2013 sequel. She has also guest starred in episodes of How I Met Your Mother and Raising Hope. She continues to release albums and headline world tours.

Career: Ricci made her film debut in 1990's Mermaids and has rarely been out of work since. After starring in 1993's Addams Family Values, she became disillusioned with her education and began attending The Professional Children's School - one of her classmates was Macaulay Culkin. She made the transition from child star to respected actress with 1997's The Ice Storm. Movies since include Fear and Loathing in Las Vegas, The Opposite of Sex, Sleepy Hollow, and Monster. She also produced the films Prozac Nation and Pumpkin, and appeared in a memorable Grey's Anatomy two-episode storyline in 2006. Her recent projects include Penelope, Speed Racer, New York, I Love You and short-lived period drama Pan Am.