Leonardo DiCaprio
One of the biggest actors in Hollywood debuted in none other than a low-budget horror sequel, Critters 3 (1991). Long before DiCaprio sunk on the Titanic alongside Kate Winslet, he fought for survival against the Krites as Josh, the stepson of a deceitful landlord. Fortunately, he met a less gruesome fate than his stepfather.
Richard Jenkins
Jenkins is now a two-time Oscar nominee, but the veteran actor once shared the screen as a newbie with Michelle Pfeiffer, Susan Sarandon, Cher, and Jack Nicholson in The Witches of Eastwick (1987). Jenkins was roughly 40 years old when he was cast in his first sizeable role. "I drove to the set on the first day and they wouldn't let me in," he recalled. "I said, 'But you don't understand, I'm in the movie,' and the guy on the gate said, 'Yeah, sure, me too, buddy.'"