Brian Cox is set to voice Santa Claus in Netflix’s upcoming festive animated feature “That Christmas.”

Due later this year, the film marks the directorial debut of animation veteran Simon Otto and comes from Locksmith Animation (“Ron’s Gone Wrong”). “That Christmas” is adapted from the children’s book series by BAFTA-winning and Oscar-nominated writer and director Richard Curtis.

Alongside Cox, Fiona Shaw, Jodie Whittaker and Bill Nighy have also joined the film as the residents of a charming seaside town where things turn upside down one Christmas. Other voice stars include Lolly Adefope, Alex Macqueen, Katherine Parkinson, Sindhu Vee, India Brown, Zazie Hayhurst, Sienna Sayer, Jack Wisniewski, Rosie Cavaliero, Paul Kaye, Guz Khan, Andy Nyman, Kuhu Agarwal, Bronte Smith, Freddie Spry, Ava Talbot and Rhys Darby.

‘That Christmas’

“Becoming an animator had been on my Christmas wish list ever since I was a child and watching animated movies was...