Reason Angelina Jolie kissed her own brother on the lips in multiple red carpet photos

The Oscars appears to be go-to event for strange controversies, but there was one that took the cake and now we know why it happened.

Since it was founded in 1929, the night where celebrities flaunt their looks and get ready to take home the golden trophy for their work has been watched by millions worldwide.

From Ricky Gervais' controversial jokes about Jeffrey Epstein and Will Smith slapping Chris Rock across the face to Leonardo DiCaprio's love life and John Cena turning up 'naked' - a lot has certainly happened at the Oscars over the years.

But there have been a few moments that can only hope to compete to when Angelina Jolie and her brother, James Haven, made a bizarre statement on the red carpet in 2000.

Angelina Jolie smooched her brother on the red carpet in 2000. (Ron Davis/Getty Images)

It’s been 24 years since that moment, and if you remembered when it happened and was plastered all over the news - you’re officially old.

At the time, the then-24-year-old Jolie won an Oscar for her performance in Girl Interrupted in 2000.

But it was once she took to the Academy Awards stage after picking up the award for Best Supporting Actress, Jolie expressed her love for her brother Haven, then 26, who accompanied her.

Jolie said: "I’m in shock, and I’m so in love with my brother right now.

"He just held me and said he loved me, and I know he’s so happy for me. And, um, thank you for that."

But when they went outside, they posed for a picture when Jolie turned and kissed Haven on the lips.

Why did they do it?

She revealed months later when asked that it was just 'brotherly' love.

Jolie told Entertainment Weekly: "My parents really loved that moment, and that’s what will always matter."

The pair were heavily criticised for years after the kiss. (Ron Galella, Ltd./Ron Galella Collection via Getty Images)

Haven also had his say, telling the Daily Mail in 2007: "I did not give Angie a French kiss. It was something simple and lovely. She was about to go off to Mexico to finish filming Original Sin with Antonio Banderas.

"I congratulated her on the Oscar win and gave her a quick kiss on the lips. It was snapped and became a big thing."

But that’s not the only rather bizarre move Jolie has pulled over the years.

When she was married to her second husband, Billy Bob Thornton, the two decided to wear a vial of each other's blood around their necks.

Speaking about that moment in 2014, Thornton said it wasn’t so weird at the time.

The Bad Santa star explained: "She thought it would be interesting and romantic if we took a little razor blade and sliced our fingers, smeared a little blood on these lockets and you wear it around your neck just like you wear your son or daughter's baby hair in one.

"Same thing. From that we were wearing quart jars of blood around our necks.

"And we were vampires and we lived in a dungeon."