Turns out that smooching fellow celebrities isn’t for everyone! For this list, we’ll be looking at times when an actor reportedly hesitated, or even downright refused, to kiss another actor for a movie. Our countdown includes actors such as Brad Pitt, Reese Witherspoon, Julia Roberts, Rachel McAdams, Ryan Gosling, and more! Did your favorite pair of actors who refuse to kiss each other on screen make the list? Let us know in the comments!