Oscar winner Leonardo DiCaprio admits to director Paul Thomas Anderson that not starring in "Boogie Nights" remains his greatest Hollywood regret.

Leonardo DiCaprio said his 'biggest regret' in his career was turning down Mark Wahlberg's role in 'Boogie Nights,' which he called 'a masterpiece'

Leonardo DiCaprio says the biggest regret of his acting career is turning down Paul Thomas Anderson's offer to star as the lead in 'Boogie Nights.'