Renée Zellweger
It took decades, but Renée Zellweger finally acknowledged her humble beginnings as Jenny in Texas Chainsaw Massacre: The Next Generation (1995) alongside co-star Matthew McConaughey, who played a viscious psycopath with a mechanical leg. "Best workout ever," Zellweger said of the slasher flick. "Live chainsaw—that's some motivation to get running! Fast!"
Julia Louis-Dreyfus
Julia Louis-Dreyfus wasn't always Elaine Benes from Seinfeld. The actress got her big break in the 1986 horror-fantasy hybrid Troll. Louis-Dreyfus plays Jeanette, a struggling actress who is transformed into a wood nymph by the havoc-wreaking troll Torok. Although Louis-Dreyfus may have made a strong first impression, she never returned to the horror genre.