Patrick Demsey has a (mc) dreamy home!The "Grey's Anatomy" star is showing off his beautiful Frank Gehry Malibu home in the March issue of Architectural Digest.  "We were looking for a little land and space, and a house with some architectural significance," the actor explains. "The exterior's simplicity appealed to me, and the inside felt very expansive and calming. Everywhere you looked there was something visually pleasing."The house was designed by architect Frank Gehry, and was originally intended to be a combined studio and residence when it was built in 1968. Dempsey lives in the fabulous home with his wife Jilian and their three children - daughter Talula, 12, and twin boys Darby and Sullivan, 7. "When Patrick and Jillian moved in with the children, it changed the dynamic of the property," landscape designer Scott Shrader tells the mag.The Dempseys have transformed the space into a comfortable family-friendly home, complete with swimming pool,...