Reformed bad boy Colin Farrell says even the birth of his first child in 2003 didn’t slow him down. “I made a decision not to change,” he recalls in Details’ November issue. “I literally said, ‘I’m not changing! I’m gonna be his friend!’ Like a [bleeping] 28-year-old drug-addicted drunk friend is exactly what my 6-week-old son needs.” But, “I’ve got eight hours a day now that I didn’t have before, when I was drinking every day for 18 years . . . It’s honest, it’s real. That’s quite simply the coolest thing.”