- Video: Interview with Jessica Biel
- Blog: More entertainment at OnTheRedCarpet.com
- More: Most Popular stories, videos and more
- More: Get breaking news alerts
Biel says she comforted by the fact that she's not alone. She's got dozens of other singers, dancers, actors and musicians to help show her the ropes.
"The people are so skilled, and they just know how to be on a stage," said Biel. "So I feel like I'm learning and taken through, taking me along, they're there for me. So it's been a very nurturing experience."
At Friday's dress rehearsal, Jessica faced a live audience for the first time -- and that's the part that excites her most about this challenge.
"Anything can happen. Anybody can change things up," Biel explains. "A mistake could happen -- have to go through, the show must go on. No 'Take two,' so it's quite big adrenaline rush."