The show is being played at the Hudson Theatre in Manhattan and has been extended through its initial finish on July 10.
The couple share three children, James Wilkie, 19, and twin daughters, Marion and Tabitha, 12.
Prior to her marriage, Sarah was in a relationship with Robert Downey Jr from 1994 until 1991.
The former couple met on the set of First Born, with Sarah blaming his drug addiction for the demise of their relationship.
She told Entertainment Wise in 2006: “I believed I was the person holding him together.”