The quality of a movie kiss can make or break a film.

Even the most perfect first kiss scenes in movies have a story behind them, though.

In fact, DiCaprio spent much of his time on the set trying to gross his co-star out.

kiss scene from Romeo + Juliet

These were the early days and nights of the Force."

As they say, practice makes perfect.

For Tobey Maguire, however, the moment wasn’t nearly as lovey-dovey as it looked.

Kiss scene from Titanic

“Because of all the water pouring down I couldn’t breathe,” he remembered.

“The rain was pouring up my nose.

Then she was kissing me and I couldn’t breathe out of my mouth!

Kiss scene from The Empire Strikes Back

So, I had to hold my breath while I was kissing her.

I would sneak little breaths out of the corner of my mouth.”

Who knew a kissing scene could be the riskiest bit of an action movie?

Kiss scene from Spider-Man

For Emma Watson and Rupert Grint, who’d been working together since childhood, it was simply awkward.

As Watson described toMTV News, “I was like, ‘Do I use tongue?

Do I not use tongue?

Kiss scene from Harry Potter and the Deathly Hallows: Part 2

Do I cover my teeth?

What do I do?

Do I go first?

Kiss scene from Twilight

Oh my God!’

I ended up pouncing on Rupert.

I was so desperate to get it over.

Kiss scene from Romeo + Juliet

After the first take he was like, ‘Whoa, there!

Where did that come from?’

I was like, ‘Sorry!'”

Kiss scene from Lady and the Tramp

Twilight (2008)

Rarely are screen couples’ first kissesthisreserved.

So, the two take it maddeningly slow before Edward leaps away from the bed.

“That was a hard scene,” he remembered.

Kiss scene from Sixteen Candles

“I was always kind of preempting the pull back so I’m not sort of leaping away correctly.

Put simply, the two share some kiss chemistry that simply could not be feigned.

First Danes accidentally broke off a piece of the set.

Kiss scene from Love Actually

Lady and the Tramp (1955)

Cartoon dogs can have serious schmaltz, too!

Believe it or not, the scene almost didn’t make the cut.

She ends up sharing a kiss with her high school’s resident dreamboat, Jake Ryan.

Mandy Moore, Shane West

At least the two later co-starred in a film calledFresh Horses.

A pity kiss, of course, but a kiss nonetheless.

The movie was alsoMandy Moore’s big break into acting.

Chad Michael-Murray, Hilary Duff

Hey, that’s why they call it acting!

“But like, probably way more awkward because there were 270 people watching,” she admitted.

Maybe it wasn’t the Cinderella story we’ve all dreamt of after all.

Heath Ledger, Julia Stiles

It happened to be the same situation when it came to Ledger’s fame.

Their careers became quite legendary after locking lips.

Her response to her their first onscreen kiss was simply “yuck,” as reported byEntertainment Weekly.

Macaulay Culkin, Anna Chlumsky

“I’m lucky.

I’m pretty lucky,” he admitted toFilmwebof his on-screen kissing resume.

However, Zendaya, on the other hand, felt like she needed to clarify for fans.

Zac Efron, Zendaya

Newswhen asked about the rumored romance between the two stars.