Justin Theroux Wishes Jennifer Aniston Happy Birthday -- See the Pic!

"Jen has always been a hard worker and a perfectionist when it comes to filming", a source previously told PEOPLE.

He went on to marry Jolie in 2014, while Aniston married actor Justin Theroux in 2015.

'Brad, for long, was a very important part of Jen's life. "She's with Ross, then not, then back again!" wrote one fan on Twitter..

Jennifer couldn't have looked better in the image, which showed off her gym-toned arms to perfection. "Many of his close friends were at the party too", an insider told the publication. "They aren't a big part of each other's lives now, but they wish each other well and have fond memories about the good times they had together". "They hugged and chatted for a bit, but Jen was busy making sure all of her other guests had an awesome time".

Other guests at the party were said to include another of Brad's former flames, actress Gwyneth Paltrow, as well as Jennifer's former boyfriend John Mayer, and the singer's ex-girlfriend Katy Perry, who arrived by motorcycle with her partner Orlando Bloom.

Other celebrities present included George Clooney, Reese Witherspoon, Ellen DeGeneres, Sandra Bullock, Kate Hudson, Demi Moore, Barbara Streisand and Robert Downey Jr. She shared her love for Aniston on Instagram today, January 11, with pictures of her, Kate Hudson and Aniston from the party.

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Love these ladies -Celebrated this beauty last night ✨Happy Bday JA!

Paltrow also wished her dear friend a "happy birthday".

"Our ray of sunshine, example of perpetual goodness".

In an interview for the January issue of Elle magazine, Aniston also spoke on their 2018 breakup.

She said: 'I don't feel a void. "It was seen as a really nice gesture by her for him being there and something that she really appreciated". "They've come so far since their marriage and plan to stay friends for life".

  • Michelle Webb