'Once' Co-stars Jennifer Morrison, Sebastian Stan Reportedly Split

Credit: BFANYC

Apparently happily ever after was not in the cards for Once Upon a Time co-stars Jennifer Morrison and Sebastian Stan.

"They broke up at least four months ago. They have gone their separate ways -- no bad blood," a source revealed to Us Weekly of the former couple.

Added yet another informant, "They just grew apart."

The couple first met on the set of Once when Stan had a guest appearance as the crazed Mad Hatter way before there was a Wonderland spin-off in the works.

They began dating in the summer of 2012 but we guess their summer loving just wasn't made to last.