Are Oreos Dairy Free?

I’m a newbie vegan and I have a burning question that’s been on my mind lately. Are Oreos dairy-free? I mean, they’re cookies, right? And cookies are usually made with flour, sugar, and butter. But Oreos have that creamy filling that’s so addictive. So, does that mean they contain dairy? I don’t want to accidentally break my vegan diet by indulging in some Oreos. Help a girl out!