The Oscar winners might be yet to be revealed, but there are one or two certainties which we can rely on seeing at this year’s ceremony on Sunday. With the Academy Awards now in its 84th year, there are a few characters which crop up time and time again – how many of this lot will we be seeing this year..?

The 84th Academy Awards 2012 Oscars moments memorable

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The Oscars 2012: What to Spot!, 4.0 out of 5 based on 1 rating

The Unlikely Couple
While we might like to think that the Oscars is all about the films, it's probably fair to say that that's not always strictly true. With so many big names in town, there's always plenty of interest in who arrives and leaves the ceremony together - and an unlikely coupling is always far more interesting that predictable red-carpet romantics. When Angelina Jolie won Best Supporting Actress back in 2000, she shocked audiences by proclaiming, "I'm so in love with my brother right now" before sharing what appeared to be a rather passionate kiss with him on the red carpet - can this year get much more unlikely than that?

The Over-Emotional Speech
This is a classic Oscars move, where gracious winners are seen blubbing through their acceptance speeches in a teary attempt to thank everyone they've ever met for helping them to achieve their dreams. We saw this back in 2002 when Halle Berry won best actress while proclaiming "This moment is so much bigger than me", as well as in 1999, when Gwyneth Paltrow famously made a long and tear-filled speech after winning the same award. Could it be Rooney Mara, Meryl Streep or Michelle Williams turning on the waterworks this time around?

The Political Activist
For some, it would seem that winning an Oscar isn't simply an opportunity to say a few thank-you's and collect a statuette. No, it's a chance to air your political views to the world! Palestine Liberation Organization supporter, Vanessa Redgrave, took to the stage to speak out against 'Zionist hoodlums' during her 1978 acceptance speech and, naturally, Michael Moore was also keen to use his 2003 Oscar win to call George W. Bush a 'fictitious President', whilst being booed by the crowd. Just two years ago dolphin activist Ric O'Barry held up a banner reading "Text DOLPHIN to 44144" - proving that there's no knowing just what these Oscar winners might be keen to take a stand against.

The Absentee
Absentees are less common now than they used to be, and that's partly down to Marlon Brando. Brando made a statement in 1973 when he sent Sacheen Littlefeather to decline his Best Actor award, in an attempt to raise awareness about film industry's treatment of Native Americans - prompting the Academy to ban awards from being collected on the winner's behalf. Despite being something of a favourite with the Academy, Woody Allen has also famously avoided attending the Oscars for many years. However, in 2002 he made a rare and unannounced appearance, asking producers to continue making films in New York in the wake of the 9/11 attacks.

The Attention-Seeker
Every year there is at least one attendee who is determined to make sure that all eyes are on them. Back in 1986, singer and actress Cher made sure that she stole the limelight by ignoring the Oscars' dress code, and arriving at the ceremony wearing...well, not very much at all - apart from a huge, spiky headdress (much to the annoyance of whoever was sat behind her, we imagine). Back in 2000, when the creators of South Park were (bizarrely) up for an award, they decided to attend the event dressed in outfits worn by Gwyneth Paltrow and Jennifer Lopez at previous ceremonies - but that's nothing compared to bonkers Icelandic songstress Björk, who not only wore a quirky 'swan dress' to the Academy Awards back in 2001, but also proceeded to 'lay' an egg the red carpet. Sacha Baron Cohen may have been the bookies' favourite for this one after he hinted at plans to attend the ceremony as his latest character, The Dictator, but after reportedly having his invite withdrawn by the Academy, the attention-seeker spot is once again up for grabs - we can't wait to see who fills the role!

The 84th Annual Academy Awards takes place this Sunday 26th February.