When it comes to chatting up celebrities, you can't always expect a lot from them!
CNN anchor Don Lemon learned this the hard way after he spotted Jonah Hill in a hotel lobby and said hi, but was greeted with a near cold shoulder back.
This obviously upset Don, who made it clear that he wasn't going to stand for a bad greeting, as he took to his Twitter and a morning show on CNN to bash the Get Him To The Greek star.
He called out Jonah on Twitter, and it was all downhill from there when he got a response:
We're not sure if Jonah was rude, or if Don was just over-reacting. Either way, these two need to start over and get a fresh start! Hopefully they can work things out.