Spencer Pratt is out peddling his lil barely there career by calling out Mary-Kate Olsen who dissed him on the David Letterman Show while promoting her film

During her appearance Thursday night on the Late Show with David Letterman, Mary-Kate Olsen revealed that she used to go to high school with former Hills star Spencer Pratt.

The pint sized Olsen doesn’t really have fond memories of Pratt either.

“He does not have a good temper,” Olsen, 22, told David Letterman. “He used to play on the soccer team … (and) he walked out of a few games. He would walk off the field.”

Speaking to USmagaze, Pratt fired back saying, “She should probably focus more on not getting dressed in the dark than on me.” The two went to high school in L.A. – though Spencer says he went to Crossroads, while MK went to Crossroads.

“I know I’ve made it when a famous troll is talking about me on Letterman,” says Pratt.

Mary-Kate was on the late night talk show promoting her new movie, “The Wackness.”