Evan Rachel Wood, Sterling K Brown board voice cast of 'Frozen II'

Actors Evan Rachel Wood and Sterling K Brown have boarded the voice cast of Disney's upcoming animated feature "Frozen II".

The announcement was made during the D23 expo here on Saturday.

The two actors join returning cast members -- Idina Menzel as Elsa, Kristen Bell as Anna, Jonathan Groff as Kristoff and Josh Gad as Olaf -- in the film, which is a sequel to 2013 feature "Frozen".

Wood, the star of HBO's sci-fi western series "Westworld", will portray Queen Iduna, the mother of Anna and Elsa.

"This is a dream come true. I can't believe I'm a part of this. I just can't wait to see the film," the actor, who was present at the event, said.

Brown will essay the role of Lieutenant Matthias.

The official plotline of the film reads, "Three years after the events of the first film, Elsa starts to hear a strange sound from the north calling her. Together with her sister Anna, Kristoff, Olaf, and Sven, they embark on a new journey beyond their homeland of Arendelle in order to discover the origin of Elsa's magic powers and save their kingdom."