Olivia Wilde always manages to nail casual chic street style. The actress, 39, was spotted out in Hollywood laughing with friends grabbing dinner at L.A. hotspot Saffy’s. She took animal-print seriously, breaking out a funky black-and-white sweater by one of her favorite brands, La Ligne. The knit crewneck, called “Le Zoo,” features rows of zebras looking in different directions. Wilde …