Sometimes, celebrities have a strangely close bond with their siblings - look at the Kardashians, the Hemsworths, the Olsens or even the Jonas Brothers. Stuck to each other like glue.
But some stars have really gone that extra mile to show off their kinship, such as Angelina Jolie and her brother James Haven, who shared a bizarre kiss on the red carpet at the 2000 Academy Awards.
The images are ingrained in all of our memories, whether we like it or not. Now, more than two decades on from the strange smooch between siblings, Haven has revealed what the current relationship with his sister looks like in a rare interview.
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Avid award ceremony watchers and fans of Hollywood's elite may recognise Haven as the bloke who was often seen on his famous sister's arm at events around the time she began her infamous relationship with Billy Bob Thornton.
The retired actor, now 52, accompanied Jolie to the Academy Awards all those years ago to watch her pick up an Oscar for her stellar performance in Girl Interrupted.
The pair then took their closeness to a whole new level outside in full view of the media while posing for pictures.
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As Jolie proudly clutched her golden statue, she turned and kissed Haven on the lips in front of the rows of waiting photographers and cemented their spot in tabloid history as the kissing siblings.
The smooch generated headlines around the world and popped up in interviews for years after - especially because it was actually the second time in a matter of months that the pair had locked lips in public.
A similar scenario went down at the 2000 Golden Globes, which had taken place just a couple of months earlier, where awkward pictures first emerged of Jolie and Haven kissing on the lips.
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With their eyes tightly shut and arms locked around each other, it's no wonder people were left pretty baffled.
But when asked about the kiss later that year, Jolie insisted that the peck was nothing more than 'brotherly' love and said that her 'parents really loved that moment' between their kids, which is all that mattered to her.
Haven has also been probed over the backstory to the infamous smooch.
Talking to the Daily Mail in 2007, he said: "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.
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"I congratulated her on the Oscar win and gave her a quick kiss on the lips. It was snapped and became a big thing."
Now, more than 20 years after the strange moment, Jolie's brother has revealed the state of their relationship now.
During an appearance on the 90who10 podcast, Haven explained how he felt it was his 'duty' to protect the Maleficent star throughout her bitter divorce with Brad Pitt.
He said: "That's where it all started, it started with the protection of her and then of her children, my nieces and nephews. There are those are massively formative years, they're becoming young adults in their early 20s."
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Jolie and Pitt share kids Maddox, 22; Pax, 20; Zahara, 18; Shiloh, 17; and twins Knox and Vivienne, 15.
Haven continued: "That's so crazy thinking that, but yeah, I think it's just very natural [to feel protective] and I just want to be there. Very much like my mom. Anytime I'm blessed to be in their presence, I want to be in their presence.
"[It's] a quality I got from my mom, even though cell phones were not as prevalent as they are now, but back to that idea of her always being like, 'You are the focus'.
"I set my life up so I can be present with whatever the situation. The formative years, the young adults they're going to become, I want to be there for them — or for her — whatever she's going through."
Referring directly to his sister Jolie and possible future projects for them both, Haven added: "We have very mutual interests, especially if it's focuses on how to help kids or stuff like that.
"And I know there's going to be many things in the future that we'll probably be working on, which we've never done publicly, like together, but I think there's many things in the future that I think we'll do together."
Topics: Angelina Jolie, Brad Pitt, Celebrity, Weird, Sex and Relationships