Manny Heffley (b. circa 2004) is Greg's younger brother in the Diary of a Wimpy Kid book and film series. He is the obvious parental favorite of the family, with his mother blatantly and relentlessly spoiling him and letting him get away with everything. Manny is proven to be one of the worst antagonists in the Diary of a Wimpy Kid book series. He was the main antagonist of Cabin Fever, as he almost froze his whole family by killing the power to all rooms in the house except his own while there was a blizzard, which he claimed was because nobody taught him how to tie his shoe laces.