Back in the nineties, Leonardo DiCaprio (42) had to choose between either the male lead in "Titanic" or the one in "Boogie Nights". We know by now that he chose the role of "Jack Dawson", which brought him great success. But today, he sometimes regrets not going for "Boggie Nights". Mark Wahlberg ended up playing "Dirk Diggler" and he did a great job.