Movie star Bruce Willis' asking price on his Central Park apartment is pretty audacious, considering that his real estate listings lately have been less yippee-ki-yay and more ay-yi-yi.

He bought the three-bedroom, four-bath co-op unit from U2 bassist Adam Clayton in March 2013 for $8.85 million.

Now, less than two years later, he has put it on the market for $12,995,000 -- a markup of nearly 50 percent.

Photos and floor plans from the current listing and the 2013 listing indicate that Willis knocked down walls between the dining and living rooms as well as between those two rooms and the foyer, but the layout doesn't appear to have been otherwise altered.

The current listing mentions that the "fabulous kitchen was created from two maid rooms" -- but 2013 pictures and floor plans show that Clayton executed that overhaul.

And if you're wondering why they're selling after such a short time: They just had their second daughter (Willis' fifth) in May, so "now they need something bigger,"