Hollywood's sweetheart Reese Witherspoon got a little naughty recently in two videos captured by English model Cara Delevingne.

Delevingne's videos were captured inside of an elevator during NYC's coveted Met Ball earlier this week.

In the video, Witherspoon reveals a girl tip that might be useful in the bedroom.

Listen up ladies!

"[You know] what's the most important thing in a name for a girl? It's that a man can whisper it into his pillow," Witherspoon said to the camera.

Reese also teased that she loves Cara but had trouble pronouncing her last name...or did she?

"I love you Kara. Cara. I don't know what your fuckin' name is," Reese explained. "That's super French."

Then she continued, "If you force me to say your last name, I'll be f-ed."

But suddenly, as though she forgot her what she said just moments ago, Witherspoon leans in alluringly towards the camera in her already seductive low-plunging gown and pronounces Cara's last name perfectly.

Cara captured the steamy moment via two videos she posted on to her Instagram account. Soon after, she deleted the videos.

Perhaps the videos were just too hot to handle.

Gawker.com reported that actress Zooey Deschanel and model Kate Upton were also in the elevator during Witherspoon's sexy moment appearing giddy and full of excitement.

Witherspoon may have shown off her sexy side at the Met Ball this week, but she got a serious make under for her role in the new movie "Devil's Knot" that came out in theaters and VOD on Friday.

In the movie, Witherspoon plays the mother of one of three boys from the infamous "Memphis Three" killings of 1994.

"It's unreal how generous she was and how she completely allowed herself to become this southern mom," "Devil's Knot" director Atom Egoyan told E! News. "That to me was awe inspiring, and it was to the other actors as well. She was part of this ensemble, and she really wanted it to be as authentic as possible."