The former couple ended their five-year marriage back in October 2005. One month after finalising the divorce papers, Pitt moved on with Mr and Mrs Smith co-star Angelina Jolie.
The couple share six children together but called it quits in September 2016 after two years of marriage and 10 years together.
Aniston also recently divorced from her partner, Justin Theroux, after two and a half years of marriage.
The couple released a joint statement to break the news which read: "We are two best friends who have decided to part ways as a couple, but look forward to continuing our cherished friendship."
But Pitt and Aniston's newfound friendship isn't entirely surprising, as they famously reunited at the former Friends actress' 50th birthday bash back in February.
Most recently, the actor also made the starry guest list at Aniston's annual Christmas party which took place at her Bel Air residence.
"It took a while for Jen to heal and for Brad to stop feeling bad for how he left her back in 2005," the source highlighted. "This is something they've taken their time with, and they're well aware of the hysteria around their relationship among their fans."