There's no business like show business, and Hollywood's a workplace that needs to rejuvenate more than most. Fierce competition, alongside various other reasons have given these stars less and less airtime.
Lindsay Lohan: Legal and personal struggles have diminished this once 'Teen Idol's' career.
Mel Gibson: Until recently, Gibson was on a decade long hiatus between 2006 and 2016.
Katherine Heigl: Best known for 'Grey's Anatomy', Katherine left the show in 2010 to focus on film but has not replicated her success.
Hugh Grant: A real A-lister at the turn of the century, Grant's disdain for celebrity life has now lead him to work on smaller-scale TV series with the BBC.
John Travolta: Travolta's moved onto TV series, but everything is a far cry from the success he had in bygone decades.
Eddie Murphy: Like Travolta, Murphy had his breakthrough in the 80s and has an ever shrinking presence.
Halle Berry: Her roles are increasingly secondary, and the movies are less and less lucrative.
Paris Hilton: One of the biggest personalities of the 2000s has conceded her place among A-listers to the likes of 'The Kardashians'.
Demi Moore: One of the highest paid actresses of the 1990s has opted for more subtil roles in independent films.
Charlie Sheen: Sheen earned $1.8 million for every episode of 'Two and a Half Men' in 2010. Alcohol, drug and marital issues then quickly dethroned him as TV's highest paid actor.