Brad Pitt was at Jennifer Aniston's 50th birthday and everyone's confused

Wait, what?

Jennifer Aniston is one of the most popular women in Hollywood. It’s hardly surprising therefore that half of the film industry seemed to turn up to her 50th birthday party this weekend.

In fact, it’s hard to think of an A-lister that wasn’t in attendance.

The party that took place at LA’s Sunset Tower Hotel on Saturday is said to have seen a star-studded guest list, from Courtney Cox, Lisa Kudrow, Gwyneth Paltrow, George and Amal Clooney and Reese Witherspoon, to Kate Hudson, Ellen DeGeneres, Barbra Streisand, Laura Dern, Demi Moore, Orlando Bloom and Katy Perry.

Yes - everyone was there, even a couple of Jen’s exes.

According to PEOPLE, Jen’s ex John Mayer was in attendance, but it wasn’t the 'Free Fallin’ singer’s attendance that made the most news. Instead it was the presence of Jen’s ex husband, Brad Pitt.

Yes. This is not a drill. Brad Pitt attended Jennifer Aniston’s 50th birthday party - and everyone’s confused.

The former couple, who split in 2005 after five years of marriage, have recently split from both of their spouses, Angelina Jolie and Justin Theroux. Brad’s attendance at this ex-wife’s birthday bash therefore added fuel to rumours of a romantic reunion.

Sources close to the couple however have apparently rubbished the rumours, with one telling E! News, ‘Someone extended the invitation to Brad to come to Jen's party and he accepted.

‘He wanted to support Jen and it was a momentous occasion,’ the source continued. ‘But that's the extent of it. It was a social evening with a lot of people who have been a part of her life. They definitely aren't dating or on that path. They are friendly, but that's it.’

Going on to talk about the former couple’s relationship, the source continued: ‘Brad and Jen talk or text once in a while. If something comes up like a birthday or a big occasion they will reach out and congratulate the other. They don't talk or see each other all the time. They aren't a big part of each other's lives currently, but they wish each other well and have fond memories about the good times they had together.’

Move over Chris and Gwyneth - these two are ex goals.