An actor's job is to kiss and tell. But when you fall in love on-screen, lines and feelings can get blurry, leading stars to meet on set, and begin relationships they'll later regret. These are the actors who enjoyed kissing their co-stars too much.

When Brad Pitt and Angelina Jolie filmed Mr. & Mrs. Smith in 2004, they shared a steamy on-screen kiss, and danced the tango together. Of their meeting, Jolie told Vogue,

“We found this strange friendship and partnership that kind of just suddenly happened. I think a few months in I realized, ‘God, I can’t wait to get to work.'”

While it sounds innocent enough, Pitt was married to Jennifer Aniston at the time, and affair rumors spread like wildfire. Pitt and Aniston denied the speculation amid their January 2005 split, but Pitt and Jolie's subsequent relationship suggested otherwise. Brangelina were together for 12 years, married for two, and raised six children together. Jolie even told The New York Times,

"Not a lot of people get to see a movie where their parents fell in love."

When their romance ended in September 2016, potential reasons for the split pointed to Pitt's alleged behavior during an in-flight argument with Jolie and their eldest son, Maddox. The incident reportedly prompted Jolie to file for divorce the following day. Their divorce proceedings resulted in a nasty custody battle. Speaking with Vogue India, Jolie explained,

"I separated for the wellbeing of my family. It was the right decision."

Keep watching for more about Actors Who Enjoyed Kissing Their Co-Stars Way Too Much.

#ActorRomance #CelebrityKisses

Brad Pitt and Angelina Jolie | 0:00

Chad Micheal Murray and Sophia Bush | 1:35

Liam Hemsworth and Miley Cyrus | 2:43

Kirsten Stewart and Robert Pattison | 3:57

Tori Spelling and Dean McDermott | 5:08

Bradley Cooper and Lady Gaga | 6:21

Mandy Moore and Milo Ventimiglia | 7:22

Milo Ventimiglia and Alexis Bledel | 8:15

Penn Badgley and Blake Lively | 9:16

Ryan Gosling and Rachel McAdams | 10:08