AP: Shades of North Korea's Founder in Its Young New Leader →

The resemblance is striking: the full cheeks and quick smile, the confident gait, the habit of gesturing with both hands when he speaks.

North Korea's young new leader, Kim Jong Un, appears to be fashioning himself as the reincarnation of Kim Il Sung, his grandfather and the nation's founder, as he seeks to solidify his hold on the nation of 24 million in the wake of his father's death last month.

Unlike Kim Jong Il, who sequestered himself for three years of mourning before formally taking up the mantle of leadership, Kim Jong Un is moving swiftly to demonstrate a decisiveness perhaps aimed at dispelling concerns about his ability to rule. He is only in his late 20s and made his public debut as his father's anointed successor just 15 months ago, far less time than the 20 years Kim Jong Il had to prepare to lead.

With the world watching, Kim Jong Un has tread confidently down the "red silk carpet" laid before him by his father, as one analyst put it, using family tradition as his guideposts. Kim Il Sung has served as his main muse as he seeks to consolidate power and loyalty.

"The image of a young smiling Kim Il Sung is deeply engraved in North Korean people's minds. It is the image of a young general who liberated the nation from Japan's imperial rule," said Ahn Chan-il, a political scientist at the World Institute for North Korea Studies in South Korea who was born in North Korea. "Kim Jong Un is borrowing from that. Kim Il Sung is resurrected in the looks and behavior of Kim Jong Un."

Two years ago, the world knew so little about the young man that even the South Korean government was spelling his name wrong. Here's a look at what we know now.

THE BLOODLINE

Kim Il Sung and Kim Jong Il were characterized in North Korea as having a divine right to rule, and Kim Jong Un is leaning on this legacy as he shores up support for a third generation of Kim leadership.

Kim Il Sung founded the country in 1948, three years after Korea was divided into the Soviet-backed north and the U.S.-allied south. When he died in 1994, Kim Jong Il took over in what was the first hereditary succession in the communist world.

"His power comes from the bloodline," said Kim Gwang-in, head of research at the North Korea Strategy Center in Seoul.

Plans for Kim Jong Un to succeed his father were laid out after Kim Jong Il suffered a stroke in 2008. As recently as October, Kim Jong Il issued an order to elevate his son to supreme commander of the Korean People's Army, the Korean Central News Agency reported late last month.

"Kim Jong Il laid a red silk carpet, and Kim Jong Un only needs to walk on it," said Jeung Young-tae of the Korea Institute for National Unification in Seoul.

The most important holidays in North Korea are the birthdays of Kim Il Sung and Kim Jong Il, and it's likely that Kim Jong Un's birthday will become a national holiday as well. Exactly when he was born has never been revealed, but it's widely believed that he will celebrate a birthday on Sunday.

In recent days, North Korea's state broadcaster has aired tributes and odes to Kim Il Sung and Kim Jong Il, as well as the first documentary footage of Kim Jong Un and a tune composed to prepare for his leadership: "Footsteps."

THE LOOK

Kim Jong Un's resemblance to his grandfather is uncanny and probably strategic.

He is in his late 20s, undeniably young for the leader of a nation. But Kim Il Sung was just a few years older when he emerged in 1945 to lead the North after Japan's World War II defeat ended its colonial rule of Korea.

"When Kim Jong Un smiles, that reminds me exactly of a 33-year-old Kim Il Sung," Ahn said.

Photos of Kim Il Sung hanging on the walls of the Workers' Party Foundation Museum in Pyongyang, spotted during an October visit by The Associated Press, show a dapper young man with a startling similarity to Kim Jong Un. Even their hairlines are trimmed identically.

The grandson walks, shoulders thrown back, and gestures with both hands like his grandfather.

Last year, Kim Jong Un appeared in a light gray parka like the one his father famously wore. And during the mourning period, Kim Jong Un donned a dark Mao-style suit like the one his father wore when Kim Il Sung died in 1994.

However, since then, Kim Jong Un has traded the parka for a dark, double-breasted winter overcoat much like the jackets his grandfather favored.

THE CEREMONIES

Solemn and somber in mourning, Kim Jong Un followed the routine set by his father at Kim Il Sung's 1994 funeral. He bowed at three sides of his father's glass-encased casket at Kumsusan Memorial Palace, just as his father did 17 years earlier.

For the funeral, officials dusted off one of Kim Il Sung's Lincoln Continentals for the procession through the snowy streets of Pyongyang. Just as in 1994, mourners lined the street wailing.

But Kim Jong Un played an even more public role in the procession than his father in 1994. Barehanded and bareheaded, he walked with the hearse, right hand held up in a salute, left hand at times resting on the vehicle.

For many in Pyongyang, it was their first chance to see the new leader in person.

THE INSPECTIONS

Kim Jong Un wasted no time in wading into the public eye. His first inspection visit without his father was a well-documented New Year's Day trip to a tank unit with symbolic ties to his family and his nation's history.

He laughed and clapped during his visit with the Seoul Ryu Kyong Su tank division, and even pulled officers close to give them a word of advice. He got busy inspecting bunks and testing the water faucets.

The division was the first North Korean unit to march into Seoul during the early days of the Korean War in 1950, and was a favorite unit of Kim Jong Il's. The visit sent a pointed message about Kim Jong Un's intention to uphold his father's "military first" policy, and gave North Koreans a glimpse of his style.

The photos and documentary footage were sent within two days of the visit notably quick turnaround for state media, which in the last years of Kim Jong Il's life typically provided only still images of the aging leader.

Ahn said it seemed odd to him that state media would show Kim Jong Un's easy laughter with the troops just two weeks after his father's death.

"It is a sign of the urgency the North feels in trying to put behind the Kim Jong Il leadership," he said.

THE PROPAGANDA

New banners and posters in Pyongyang urge the people to "follow the leadership of respected Comrade Kim Jong Un" and "devotedly defend" Kim Jong Un.

Kim Jong Un also made his debut on a postage stamp: a 70-won stamp, equivalent to 50 U.S. cents at official exchange rates, depicts a smiling Kim Jong Un with his father, both clad in the same light gray parka.

His official portrait has not been made public yet, and it remains to be seen whether it will hang next to those of his father and grandfather in every building in North Korea.

Reports in South Korean media say Pyongyang's premier Mansudae Art Studio created a Jong Un portrait in 2010; it could be revealed as early as his birthday Sunday, predicted Cheong Seong-chang, a senior fellow at the Sejong Institute in South Korea.

North Koreans also show their loyalty by wearing pins of the Kims. But even today, most still wear Kim Il Sung's visage pinned to their shirts, not Kim Jong Il's.

THE NICKNAMES

Kim Jong Un became known in North Korea as the "Young General" beginning in September 2010, when state media announced that he had been made a four-star general. He became "Respected General" or "Illustrious General" last year in signs that offered blessings to him, his father and grandfather.

The day Kim Jong Il's death was announced, state media referred to the son with a new, telling nickname: "Great Successor."

"Supreme commander" of the military; "supreme leader" of the people, party and army; "great leader": the nicknames began to echo those of his grandfather and father. The most affectionate remains "dear comrade" or "dear respected comrade."

Kim Il Sung ruled as president, and remains North Korea's "eternal president" long after his death.

Kim Jong Il ruled as chairman of the National Defense Commission, a position that under the constitution gave him authority as "supreme leader" of North Korea.

It remains to be seen which title will give Kim Jong Un authority as supreme leader under the constitution.

THE IDEOLOGY

Kim Jong Il's "military first" policy may serve as North Korea's main ideology for now under Kim Jong Un, but a new ideology will likely emerge, intended to prove to the people that he can raise their standard of living.

Analysts said the goal is to link Kim Jong Un more closely to the early, nation-building years of Kim Il Sung's rule rather than the economic hardship and famine of Kim Jong Il's era.

In the 1960s and 1970s, North Korea rebuilt quickly from the ashes of the Korean War with Soviet help, and its economy was stronger than that of rival South Korea. But natural disasters and outdated agricultural practices, compounded by the loss of Soviet aid, triggered a famine that killed hundreds of thousands of North Koreans in the mid- to late-1990s. Chronic food shortages persist.

"I expect North Korea to come up with more practical ideas that can help feed the people and strengthen the image of Kim Jong Un as someone who's capable of that," said Koh Yu-hwan, a professor of North Korean studies at Dongguk University in Seoul.

Koh added that Kim "has to demonstrate that he is a capable leader from now on."