Atwell will be playing Helen Gordon, Rupert Campbell-Black's ex-wife and mother of his two children, Marcus and Tabitha. Everett is set to take on the role of her husband Malise Gordon, Campbell-Black's former show-jumping coach and mentor.

Disney+ has unveiled new casting additions for the second season of “Rivals,” with Hayley Atwell and Rupert Everett joining the ensemble as guest stars in the drama based on Jilly Cooper’s bestselling novel.

Also joining the ensemble of the Hulu and Disney+ series are Maxim Ays, Holly Cattle, Oliver Dench, Amanda Lawrence, Bobby Lockwood, Eliot Salt, and Jonny Weldon. No character details have been announced.