Walden Media has optioned Peter Craig's family comedy screenplay Relativity.

The story revolves around parents who on the occasion of their 35th wedding anniversary gather their children to reveal a big secret that sends shockwaves through the family.

Vice president of development Evan Turner brought the project to the company and will oversee.

Director of business and legal affairs Balazs Laszlo negotiated the deal on behalf of Walden with Craig's agents at Paradigm.

Craig's short film Nevel Is The Devil made its debut at the 2006 South by Southwest film festival and is an excerpt from his feature length project Green.

Craig developed Green at the Sundance writer/directors lab and will direct it in his feature debut.