By Ayeesha Walsh Sydney Sweeney opted for the ultimate vintage fashion find as she stepped out to an Oscars afterparty in an iconic dress. The cream satin plunging gown was originally worn by Angelina Jolie some 20 years ago and was proudly brought back to life by Euphoria star Sydney for arguably the biggest night out in Hollywood all year. Angelina wore the sultry piece by American designer Marc Bouwer when she attended the Academy Awards in 2004. The gown has a plunging front and is entirely backless with delicate curve-enhancing ruching to the waist. Sydney worked alongside stylist Molly D…