"Once Upon A Time" season 4 spoilers revealed the addition to the cast of John Rhys-Davies, best know for playing the dwarf Gimli in "Lord of the Rings," while Tyler Jacob Moore excited with filming.

Breathecast revealed "Once Upon A Time" season 4 spoilers when it reported that John Rhys-Davies will play Pabbie, the lovable troll king. In the animated "Frozen" film, he was voiced by Ciaran Hinds.

Creator Adam Horowtiz announced the news on Twitter last Monday when he wrote: "We're thrilled to welcome John Rhys-Davies to the #OnceUponATime family as the voice of everyone's favorite rock troll -- Pabbie! #ThisFall!"

He also added: "Excited to welcome @tylerjacobmoore to #OnceUponaTime as #Frozen's Hans. Hope you come meet him this fall in Season 4!"

Meanwhile, Tyler Jacob Moore confirmed the "Once Upon A Time" season 4 spoilers when he expressed his excitement to join the cast. In his Twitter Monday, the "Shameless" actor said: "I'm overwhelmed by you #OUAT and #Frozen fans! Thank you for the kind welcome. I'm honored to be apart of this passionate fan base/family!" Moore said.

The cast for "Once Upon A Time" and "Frozen" crossover is almost complete after Sven has been reported earlier to go to Storybrooke.

The Entertainment Weekly revealed "Once Upon A Time" season 4 spoilers when it reported that Sven,

the "lovable reindeer," will be part of the "Frozen" characters making their way to Storybrooke, as the show premieres this fall.

According to Buzzfeed, there could be a big celebration in the horizon as the "Once Upon A Time" season 4 spoilers clip featured during the recent San Diego Comic-Con showed Queen Elsa telling Anna that, "I have a wedding present for you" while they stood over the grave of their parents.

"It looks like a lavish celebration is on the horizon. Although, given that no one has truly received a 'Happily Ever After' yet on this show, one never knows..." it said.