Ryan Seacrest said he was supposed to be the guy married to Heidi Montag ... in Adam Sandler's upcoming movie, at least.
In a radio interview with Jennifer Aniston -- who stars in the Sandler movie "Just Go with It" -- Ryan confesses that he was originally supposed to play the role of Heidi's husband, now filled by Kevin Nealon.
According to Ryan, he said he couldn't do it because the movie films in Hawaii and he's caught up with all that "American Idol" stuff in L.A.
According to Jennifer, Ryan really missed a great opportunity.