Seoul, South Korea (CNN) -- Kim Jong Un cut a somber figure Monday, marking the first anniversary of his father's death. North Korea said Kim Jong Il died of a heart attack from overwork on December 17, 2011. Hundreds of thousands of civilians and soldiers assembled outside the Kumsusan Palace of the Sun in Pyongyang where the bodies of Kim Jong Il and his father Kim Il Sung lie. Read more: North Korea silences doubters, raises fears with rocket launch Accompanied by his wife, Ri Sol Ju, who appeared to be heavily pregnant, Kim Jong Un bowed to giant statues of the former leaders inside the mausoleum. Outside, he listened to a commemorative speech from Choe Ryong-hae, head of the military's political arm. Choe praised the achievements of the former leaders before declaring, "Kim Jong Un is North Korea's fate and future."
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Kim Jong Un has ruled North Korea for one year
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His father, Kim Jong Il died of heart attack on December 17, 2011
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Younger Kim departs from his father's style, but repression, malnutrition remain
The 20-something leader, who was suddenly thrust into the limelight last December was considered by many outside, and possibly even inside, @placeholder to be ill-prepared for the responsibilities that lay ahead.