Just like most other celebrity couples, Channing Tatum and Zoë Kravitz‘s unexpected split has had fans speculating about what went wrong between them ever since. After all, it wasn't that long ago when they were singing each other's praises during the Blink Twice press tour.

According to the source, Tatum and Kravitz' joint project, Blink Twice, was the glue that was holding them together for a while, giving them a common purpose, but once that was all over they realized they had some key differences that could spell trouble long-term.

Zoë Kravitz and Channing Tatum were the definition of couple goals while promoting their film Blink Twice — just two months before calling it quits. Kravitz, who directed the psychological thriller, called then-fiancé Tatum, the “love of [her] life” during the Los Angeles premiere of the movie in August.

Channing Tatum has remained on good terms with a friend of Zoe Kravitz, shortly following his split from the star.  Tatum, 44, was spotted sharing a friendly embrace with Ben Jacobson in New York City on Sunday.

Channing Tatum and Zoë Kravitz's engagement ended, but their love story may reignite as they reunite on set for Alpha Gang, an upcoming sci-fi thriller.

Zoe Kravitz and Channing Tatum’s breakup came shortly after the couple went on a press tour for their film ‘Blink Twice,’ an insider exclusively tells Us Weekly