'Katie Holmes Must Stay Healthy For Broadway Stint'

Katies Holmes has received some helpful advice from Broadway veterans Brooke Shields and Kristen Chenoweth about the joys of treading the boards in theatre land.

Holmes recently confirmed she will be making her stage debut in the Arthur Miller play All My Sons in New York, and stage actors have been happy to dish out advice to the actress.

John Lithgow, who will co-star with Holmes in the play, tells People: "She's a pro and I'd say to be herself. She's going to be wonderful. I'm looking forward to working with her. We haven't worked together yet but it's going to be great."

Brooke Shields, who starred in Chicago as Roxie Hart in 2005, is pleased Holmes has switched from screen to stage.

She says: "She will be so happy about making that decision. There is nothing like it. It's the Olympics. It's the college of theatre."

Meanwhile Broadway veteran Kristen Chenoweth advises Holmes to rest up before her debut in October.

She says: "I would recommend her just to stay (healthy) and get a lot of good sleep and drink lots of water.

"It takes so much energy to be on stage seven days a week, so she needs a good night's sleep everyday. But I'm sure she will do just fine."