Moore, 46, has three daughters, who range in age from 15 and 20, with her ex-husband actor Bruce Willis. She has been married to Kutcher since 2005.
The National Enquirer reported Moore and Kutcher had "always resisted adoption because they wanted a baby of their own, but now everything has changed ... after all the disappointments and the (in vitro fertilization) treatments, everyone is really excited that they are making their dream come true. It's a win-win situation."
Usmagazine.com quoted Moore as saying in a posting on her Twitter account, "Don't ever believe what you read there," referring to the Enquirer article.