The actress had to leave the production due to illness and her starring role was taken over by understudy Bella Brown.

Zegler, 24, appeared back onstage in London just one night after her mid-show exit. The Golden Globe-winning actress is currently making her London stage debut as Eva Perón in director Jamie Lloyd's stripped-back revival of the Andrew Lloyd Webber classic rock opera.

Rachel Zegler left “Evita” mid-performance on Thursday due to a mystery illness and did not return. The actress’s departure was announced during intermission, per a People reporter who was present.