List of some of the most famous movie industry related people, mostly actors, who served in the army during the WW2. Some of them saw heavy combat and others gave their attribution in US.

attribution

Kingkongphoto & www.celebrity-photos.com from Laurel Maryland, USA - Mike Wallace
By charlie llewellin - https://www.flickr.com/photos/charlie..., CC BY-SA 2.0, https://commons.wikimedia.org/w/index...
John Mathew Smith & www.celebrity-photos.com from Laurel Maryland, USA - DON RICKLES © 2010