Board Thread:Support Requests - Getting Technical/@comment-34715670-20180308093030

Hey! I've recently started to contribute to Scandinavian Voice-Over Wiki, and I want to add images to some of the pages. But I wonder about copyright issues. If I find a picture of, say, an actor online, can I just post  it, or do I need permission? English isn't my first language, so please explain to me in a simple way.;) 