Video: Reese Witherspoon battles to pronounce Cara Delevingne's name

Reese Witherspoon really is a hoot.

In this vid, posted by Cara Delevinge in a crowded lift just after the Met Ball, Reese tries to pronounce her name... but can't.

“If you force me to say your last name, I’ll be f*cked,” says Reese. Adding, "I love you Kara, Cara… I don’t know what your f*cking name is… The most important thing about a name, for a girl, is that a man can whisper it in his pillow.”

The ladies are in the lift with Zooey Deschanel and Kate Upton.

Champers, much?