Who Played Alais in The Lion in Winter

Alais is a role in The Lion in Winter, a play that opened West End in 2011.

A family Christmas becomes a family at war. Henry II, not so young as he was, invites his estranged wife Eleanor of Aquitane, and his three sons, Richard, Geoffrey and John, to spend the festive season with him, his mistress Princess Alais, and her brother, the young King Philip of France. Will Henry name who is to be his successor as King of England? Their yuletide celebration turns into a combat zone of deceit, betrayal, bitter power games and scabrous wit.