However many films Leonardo DiCaprio is a part of in his career - and there have already been a blimmin' lot - his most iconic and memorable role will surely be that of Jack Dawson in 1997's Titanic.
We all know the story - Kate Winslet's aristocratic Rose and poor Jack fall madly in love whilst journeying on the RMS Titanic, and even find each other when they're flung into the water.
But the real heartbreak is that Jack gets Rose to lie on a door, and when he tries to get on too it begins to sink, leaving him to hold onto the door with most of his body submerged in the water - and when he eventually dies, it's one of the most distressing scenes in the history of cinema.
However, fans of the film staunchly refuse to believe that Jack could not have fit on the door, and every so often the naysayers pop up online with a new campaign to make people see their way.
And it turns out that Leonardo's Once Upon A Time In Hollywood co-stars Brad Pitt and Margot Robbie are among the believers, as they recently revealed in an interview alongside Leo with MTV, who asked whether Leo thought his character would have been able to fit.
Swipe through to see which singers had a cameo in a movie...
Singers that made cameos in movies - slider
1 of 21David Bowie, Zoolander
Legendary singer David Bowie played a crucial part in the original Zoolander film, briefly starring as himself to judge the "walk-off" between Derek and Hansel. Actor Ben Stiller later said he was "in shock" that David agreed to be in it.
2 of 21Justin Bieber, Zoolander 2
Biebs also starred as himself in sequel Zoolander 2, but didn't last very long as he got killed pretty early on in the film.
3 of 21Gwen Stefani, The Aviator
No Doubt singer Gwen Stefani portrayed 1930s actress Jean Harlow in the film starring Leonardo Di Caprio. Director Martin Scorsese cast her as his daughter was a huge No Doubt fan.
4 of 21Alanis Morissette, Dogma
'Ironic' singer Alanis Morissette portrayed the character of God in the Ben Affleck/Matt Damon flick, with director Kevin Smith calling her "otherworldly" and "ethereal."
5 of 21Fergie, Poseidon
Black Eyed Peas singer Fergie was actually a child actor, so it's no surprise that she returned to the screen as an adult. She starred as lounge singer Gloria in the 2006 remake Poseidon starring Kurt Russell.
6 of 21Kanye West, The Love Guru
Yeezy has actually had cameos in many films and TV shows, but 2008 film The Love Guru is probably his most well-known cameo, as he starred as himself, exclaiming, "I love hockey!" whilst watching a hockey match.
7 of 21Jarvis Cocker, Harry Potter and the Goblet of Fire
Pulp singer Jarvis Cocker appeared in Harry Potter and the Goblet of Fire as the lead singer of wizarding band The Weird Sisters, who perform at the Yule Ball. The band also featured Jarvis' Pulp bandmate Steve Mackey as well as Jonny Greenwood and Phil Selway from Radiohead.
8 of 21Ian Brown, Harry Potter and the Prisoner of Azkaban
The Stone Roses singer Ian Brown had a blink-and-you'll-miss-it cameo in the third installment of the Harry Potter films as a wizard stirring his drink with magic whilst reading 'A Brief History of Time' by Stephen Hawking sat in the Leaky Cauldron pub in the fictitious village of Hogsmeade. Brown told NME, "The director is a friend of my girl and he said, 'I've got a part if you want it. I asked my sons, and they were like, 'Do it!' I did it for my sons. My brief was to be a romantic, bohemian wizard. I was into that."
9 of 21Madonna, Die Another Day
After providing the title track for 2002 James Bond flick Die Another Day, Madonna also appeared in the film very briefly as fencing coach Verity who tutors Olympic hopefuls and tells Pierce Brosnan's Bond, "I see you handle your weapon well."
10 of 21Dave Grohl, The Muppets
Nirvana and Foo Fighters musician Dave Grohl starred in the 2011 reboot film The Muppets as a drummer in rival band the Moopets named Animool. He later had a drum-off with Animal a few years later in the TV series.
11 of 21Britney Spears, Austin Powers in Goldmember
It turns out that Britney's appearance as herself in the third Austin Powers film was all down to Beyoncé. She told the Calgary Sun, "She called me. She said she desperately wanted to be in the movie and wanted to wear a bra that shot bullets. We managed to accommodate her requests."
12 of 21Britney Spears, How I Met Your Mother
But our Brit also appeared in three episodes of US sitcom How I Met Your Mother as Abby the receptionist who is obsessed with main character Ted Mosby and ends up dating his best friend, Barney Stinson.
13 of 21Katy Perry, How I Met Your Mother
The TV show is no stranger to a celebrity cameo, also featuring Katy Perry as Honey – a very gullible character that Ted briefly dates.
14 of 21Nicole Scherzinger, How I Met Your Mother
Pussycat Doll Nicole starred as Jessica Glitter, Robin's fellow teen popstar friend who she grew apart from after Jessica had a baby.
15 of 21Enrique Iglesias, How I Met Your Mother
Enrique starred in the series as Robin's exotic lover Gael who incites jealousy from Robin's ex-boyfriend Ted.
16 of 21Jennifer Lopez, How I Met Your Mother
JLo had a brief cameo as a love interest for Barney Stinson, an author named Anita.
17 of 21Carrie Underwood, How I Met Your Mother
The last of our HIMYM cameos, country singer Carrie Underwood starred as a love interest for Ted, a pharmaceutical representative who kept him hanging on.
18 of 21Macy Gray, Spider-Man
'I Try' crooner Macy Gray featured very briefly as herself performing at a concert in the first Spider-Man film in 2002 starring Tobey Maguire as the main man.
19 of 21Demi Lovato, Grey's Anatomy
Singer Demi Lovato was a child actor, starring in plenty of shows on the Disney Channel. She guest starred in an episode of Grey's Anatomy playing Hayley, a girl who could hear everything that was going on inside her body. Scary stuff.
20 of 21Ed Sheeran, Game Of Thrones
Singer/songwriter Ed Sheeran had a very brief spot in TV juggernaut Game Of Thrones as a soldier who was, of course, singing!
21 of 21Adele, Ugly Betty
Adele starred in beloved American sitcom Ugly Betty back in 2009 as herself taking part in a photoshoot for Betty.
Leo immediately threw his head back in disbelief at the question, as Brad began to chuckle and Margot said, "Oh my god, I thought about it. I remember bawling my eyes out!" as Leo added, "No comment!"
Brad then jokily said, "That is fun. Well I’m going to go back and look now, certainly," as Margot called it "the biggest controversy in cinema history", to which Leo added, "Ever!"
She then directly asked him, "Did you mention it at the time, 'should we make the door bigger?'" and Leo replied, "Like I said I have no comment." But Brad wasn't done, and asked, "Could you? Could you squeeze in?" to which Leo once again replied, "No comment."
Well, we know what we feel about Jack definitely being able to fit on the door with Rose.
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