Jennifer Aniston receives a rather 'fierce' birthday wish from ex Justin Theroux

Hollywood actor brad pitt after her divorce from Angelina Jolie chose to restore a friendly relationship with Jennifer aniston. "But it didn't seem like that big of a deal to Jen. She isn't as happy, and she is far more complicated".

"[She did] call him the day after the party to thank him for coming".

'Brad wanted to support and celebrate Jen by attending her birthday party, ' the insider revealed.

Jennifer Aniston and Brad Pitt are living proof that true bonds can never be broken.

"Brad, for long, was a very important part of Jen's life", the source added.

It's wonderful that they can have a healthy relationship as it's obvious that they still care a lot for each other.

"Happy Birthday to this fierce Woman", he wrote along with some pretty "fierce" adjectives to describe his once upon a time ladylove.

Paltrow shared images on Instagram, saying the actress made 50 look "hot".

Of course, the question people are going to start asking now is: Will Pitt and Aniston get back together?

Sure, the lush, star-studded birthday celebration for Jennifer Aniston may be done and dusted but as we all know, the best goss from any event doesn't come out until after the party's over.

"He was invited, so why shouldn't he go? They're not necessarily close, but more friendly".

Other attendees included Katy Perry and Orlando Bloom, George and Amal Clooney, Pharrell Williams, Gwyneth Paltrow, Lisa Kudrow, Courteney Cox, Barbra Streisand, Reese Witherspoon, and Robert Downey, Jr. - just to name a few.

He married Angelina, who he raises six children with, in 2014 before separating in September 2016.