Once Upon A Time Season 4 Spoilers: Hook And Rumple Feud, Plus Scott Michael Foster On Kristoff Living With Anna

"Once Upon a Time" season 4 is currently filming, and spoilers have surfaced regarding the cast.

First, spoilers confirm that "Once Upon a Time" season 4 will have a growing feud between Rumple and Hook.

"Hook and Rumplestiltskin have a very long history that is blood-riddled and difficult that has been put aside for a little while due to circumstance," said executive producer Adam Howoritz. "But now that circumstances have changed, that past history is going to rear its head again."

In addition, spoilers by EW confirm that fans will meet Belle's mother on "Once Upon a Time" season 4.

"We are going to meet Belle's mother," added Horowitz. "For the first time, we'll delve into Belle's past pre-the encounter with Rumple."

Although the actress playing Belle's mother has not been named yet, fans are hoping for Michelle Fairley of "Game of Thrones."

Meanwhile, "Once Upon a Time" season 4 will also introduce a new arc featuring the cast of "Frozen," and recently, cast member Scott Michael Foster spoke up on Kristoff's relationship with Anna.

"He's obviously with Anna," Scott told HollywoodLife.com. "At the end of the movie, they're together."

According to spoilers, Kristoff is now living at Castle Arendalle with Anna and Elsa, and it will take some adjustment.

"He's a rugged mountain man who grew up with trolls, so there's a bunch of avenues he can take to expand his character, based off him not being used to palace life." 

"Anna is the apple of his eye."