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.'

At the time, the Oscar winner had to turn down the leading role as he was busy leading James Cameron’s ‘Titanic.’

However, he’s still kicking himself over one major misstep, an admission he made during a recent Esquire interview with Paul Thomas Anderson, whose 1997 film “Boogie Nights” took Hollywood by storm. At the time,