As the pics started to do the 'rounds on social media, commentators have labelled her 2019's mood and literally same. "The party was a celebration of Jen's life".
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.
However, amidst her friends, there was an unlikely tribute, courtesy of her ex-husband, fellow actor Justin Theroux.
"Happy birthday (last night and tomorrow) to #jenniferaniston our ray of sunshine, example of perpetual goodness", Paltrow wrote.
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It was added that Pitt 'did not stay at the bash the entire night'.
The 43-year-old actress wrapped herself up against the slight chill in a long black coat which she held together at the collar, teamed with a pair of court heels, dark sunglasses and her hair scraped back in a neat updo.
"My marriages, they've been very successful, in [my] personal opinion". There are truly no hard feelings between them.
Furthermore, another source also told the same site that there are really no hard feelings between the exes.
They split in 2017, and their divorce is expected to be finalised this year. At the time, sources said the break up was due to them spending too much time apart and wanting to do different things. Jen and [Brad] have remained friendly'.
It showed her carrying a horned statue about her head as she looked down at the camera.