Jessica Biel has been secretly taking singing lessons in preparation for her role in the Hollywood Bowl’s production of Guys & Dolls, opening this summer.

The actress, who is dating crooner Justin Timberlake, will play Sister Sarah in the new revival of the beloved stage musical.

J.B. tells WENN, “I’ve been taking voice lessons a couple of times a week and really getting to know the music and working that muscle again which has been quiet a very long time.”

“I have to learn everything before we go into rehearsal because we only have 10 days to rehearse to put the whole thing together… It’ll be interesting. I plan on seeing the Broadway show soon, which I’m hoping is good.”