Heat Vision Blog reports that Robert Downey Jr. may join the project How to Talk to Girls as a star and a producer.

The news comes just a few weeks after the actor left the Warner Bros. project Gravity. It seems that Robert Downey Jr. has shown an interest in How to Talk to Girls, a 20th Century Fox comedy, which is based on a book written by nine-year-old Alec Greven about dealing with the opposite sex.

We last reported on the movie in June 2009 when screenwriters Ben Karlin and Stu Zicherman signed on to adapt the book. Now it seems that the project could be reconceived as a starring vehicle for Robert Downey Jr., with his wife and producing partner Susan Downey spearheading the development, as well as the search for a new screenwriter.

No deals have been signed at this time. It was said that Robert Downey Jr. is only circling the project. We'll be sure to keep you posted with the status of How to Talk to Girls as soon as we have more information.