Shailene Woodley snuck into The Fault In Our Stars over the weekend. She wasn't all glammed up. She went in disguise. 

Check out this Instagram from Ansel Elgort (Gus).

And get this. She did what we all do. She snuck in her own popcorn under her coat!

The Fault In Our Stars easily beat the rest at the box office, taking in 48 million dollars.