SDCC Comic Con 2014 TMNT Teenage Mutant Ninja Turtles Cast Signed Poster. Signed by Sean Astin + 5 more 11 x 17.See picture of actual item. Thanks for Browsing my auctions! This item is in the category "Entertainment Memorabilia\Autographs-Original\Television". The seller is "80stoyman" and is located in this country: US. This item can be shipped worldwide.