Career: While appearing in the award-winning play The House of Blue Leaves in 1989, he made a spoof version of The Color of Money. It was so funny that US satire revue Saturday Night Live bought it and offered Stiller a regular spot. But when he was given his own show it flopped. He then made ends meet with a series of guest roles on TV and saved enough money to make the film Reality Bites, which he both directed and starred in. He also directed Jim Carrey in The Cable Guy, but got his big acting break in 1998's There's Something About Mary. Since then, he's starred in films such as Meet the Parents, The Royal Tenenbaums, Zoolander and Dodgeball: A True Underdog Story. He has also appeared in Night at the Museum, its sequels and seemingly endless comedy hits.

Career: Bottle Rocket was so well-received, the writers were asked to turn it into a full-length feature. Although it wasn't a hit, it launched Wilson's acting career - his frequent collaborator Ben Stiller offered him a small role in The Cable Guy after seeing the movie. He went on to star in films including Armageddon, The Haunting, Shanghai Noon, Meet the Parents and Zoolander, although he gained more critical acclaim for co-writing Anderson's films Rushmore and The Royal Tenenbaums, for which he was Oscar-nominated. Since then, he's taken starring roles in Starsky and Hutch, Wedding Crashers, Drillbit Taylor, Marley and Me, Midnight in Paris and Hall Pass, as well as reuniting with Anderson for The Grand Budapest Hotel, Fantastic Mr Fox, The Life Aquatic with Steve Zissou and The Darjeeling Limited.

Career: During his time on SNL, Ferrell impersonated US President George W Bush, singer Neil Diamond, US Vice-President Al Gore and Iraqi President Saddam Hussein. By 2001, he was the highest paid cast member, earning $350,000 a season. He left the show in 2002 but has since returned as a guest host. During his time on SNL, he appeared in a number of films, including two Austin Powers movies (1997 and 1999), A Night at the Roxbury (1998), Jay and Silent Bob Strike Back (2001) and Zoolander (2001). His first lead role was in Old School (2003). Since then, he has starred in Elf (2003), Anchorman: The Legend of Ron Burgundy (2004) and its 2013 sequel, The Producers (2005), Talladega Nights: The Ballad of Ricky Bobby (2006), Blades of Glory (2007), Step Brothers (2008), The Other Guys (2010) and The Campaign (2012). He has also turned up on the small screen in The Office, Eastbound & Down and 30 Rock. More recently, he starred in the miniseries The Spoils of Babylon.

Career: In 2003, Wiig made her TV debut in The Joe Schmo Show, a spoof of reality TV. Her big break came in 2005 when she joined Saturday Night Live (SNL). She quit the show in 2012 although she has since returned as a host. During her time on SNL, she also appeared on the big screen in Knocked Up, Ghost Town, Adventureland, Date Night and Paul. Her movie breakthrough came in 2011 when she co-wrote and starred in the hugely popular Bridesmaids. She has also voiced characters in Ice Age: Dawn of the Dinosaurs, How to Train Your Dragon and its 2014 sequel, and the Despicable Me films in two different roles.

Career: Bieber released an EP, My World, in 2009 and it was complimented a year later by his debut album, My World 2.0. It charted in a number of countries and set him on the road to becoming a global superstar. He fans are collectively known as Beliebers. He released his fourth album, Journals, in 2013. His first concert film, Justin Bieber: Never Say Never (2011), was released in cinemas and made almost $100million. His second concert film, Justin Bieber's Believe (2013), was a box-office flop. He is better known now for his various run-ins with the law around the world and his on-off relationship with singer Selena Gomez.