As part of the new pact, Relativity will have the opportunity to partner on projects Channing Tatum and his producing partner Reid Carolin develop at their unnamed production company.
The studio's relationship with the actor includes the films " Dear John," " Fighting " and the forthcoming " Haywire," all of which Channing Tatum starred in.
" Channing Tatum is an immensely talented actor and incredibly enthusiastic about finding material to produce with Reid Carolin," said Relativity production president Tucker Tooley.
Channing Tatum 's company is currently developing " The Contortionist's Handbook " with Greenestreet Films, "What's Left of Us" and "11 Minutes."
Not part of the Relativity deal is the company's first project, "Ten Year," which stars Channing Tatum, his wife Jenna Dewan, Kate Mara, Brian Geraghty, Chris Pratt and Justin Long.
Directed by Jamie Linden, "Ten Year," about a high school reunion, starts production in December in New Mexico.
Channing Tatum will next appear in the Universal comedy The Dilemma in January and the Focus Features epic The Eagle in February.
He also has in the can roles in Sony's " The Vow " and Dito Montiel's " Son of No One," which was just announced as the closing film of the 2011 Sundance Film Festival in January.
Reid Carolin most recently produced the documentary " Earth Made of Glass," which has been nominated for a 2011 Producer's Guild Award.
Jenna Dewan will also be a development partner in the company.