But don't worry, Twi-hards! The source added that it's likely that Stewart and Pattinson will reunite again.
The couple's current split comes nearly a year after Stewart's affair with her Snow White and the Huntsman director was exposed in July. The actress released a public apology to her boyfriend and reunited with Pattinson less than two months later.
Check out Kristen Stewart and 17 other celebrity cheating scandals
Since then, Stewart and Pattinson, who kept their relationship a secret for years, have been more public with their romance. In the past two months, the pair attended the Met Gala together, were spotted holding hands at Coachella and celebrated Stewart's 23rd birthday.
Do you hope K-Stew and R-Patz will work things out?