It’s no surprise that potential employers are going to look up your social media profile before they make a hiring decision, and it’s important that they are able to find you! Not having a social media presence is a red flag -- if you’re unsearchable, recruiters may think you have something to hide or that you aren’t who you say you are. More importantly, social media gives you a chance to prove that you’re a real person with a unique personality and interests that go beyond your resume. When you’ve got an extra opportunity to present yourself in a positive light, you should always take advantage of it.
Furthermore, you really don't want your potential employer to think you live under a rock. In Hollywood, you'll make yourself invaluable by being the person who always knows what celebs are popping or what YouTube videos are trending. Lots of this information comes from social media, and your presence on these sites will indicate that you're in tune with what's going on in the world. So embrace social media! When used correctly, it can benefit you tremendously during the job hunt.