Actress Jane Lynch is struggling with leg cramps "all night long" as she performs in new Broadway musical Annie.

The Glee star has been playing mean orphanage matron Miss Hannigan in the hit New York revival since May (13), and she is really suffering for her art onstage.

She tells U.S. breakfast show Today, "I do trip up the stairs at one point and I really do stub my toe because I'm method! I have cramps in my legs all night long from doing stuff like that."

Lynch will have to hobble on with the muscle cramps for another six weeks - her Broadway run is expected to run until 14 July (13).