Before he approached Robert Downey Jr.'s Tony Stark with a unique initiative, before he saw his team assembled and gave his life to uphold the integrity of all of humankind, before whispers and little scrawled signs saying "Coulson Lives" suggested that the Agent of S.H.I.E.L.D. would indeed fight another daybefore he ever made Phil Coulson into one of the best parts of the Marvel Cinematic Universe without having a single superpower, fanboy favourite Clark Gregg wrote the horror film What Lies Beneath. The 2000 movie starred Michelle Pfieffer and Harrison Ford as a wife and husband dealing with strange occurrences and a ghostly presence in their home. As far as scripts written by actors go, this is one of the tautest and most complete. Where a lesser writer would have either provided a realistic explanation to the phenomena or gone totally bonkers with the whole "ghosts exist!" thing, Gregg finds some middle ground with What Lies Beneath. He later wrote and directed the mediocre movie Choke, based on the Chuck Palahniuk book, but his successes have come from his acting roles. He's shown up in almost every Marvel movie since Iron Man in 2008 and before that appeared in The West Wing and dozens of films, and he continues to take on new roles. Hopefully someday he'll find the time to turn his attention to another script, and hopefully that script will be as great as the script for What Lies Beneath. Which other actors were you surprised to learn had penned screenplays? Let us know in the comments below!