PYONGYANG, North Korea — North Korea identified Kim Jong Il’s son as head of a top ruling party body today, a post that gives him authority over political matters in addition to the military control attributed to him in recent days.

Kim Jong Un has rapidly gained prominence since the death of his father on Dec. 17, with the state media showering new titles on him almost daily.

On Saturday, state media referred to the younger Kim as “supreme leader” of North Korea’s 1.2 million-strong armed forces and said the military’s top leaders had pledged their loyalty to him. Today, the Rodong Sinmun newspaper described him as head of the Central Committee of the Workers’ Party — a post that appears to make him the top official in the ruling party.

Kim Jong Il, who ruled North Korea for 17 years, wielded power as head of three main state organs: the Workers’ Party, the Korean People’s Army and the National Defense Commission. His father, North Korea founder Kim Il Sung remains the nation’s “eternal president” long after his 1994 death.

The Kim family has extended its control over the country of 24 million people to a third generation with Kim Jong Un, who is in his late 20s and was revealed last year as his father’s choice among three sons for successor.

He was named a vice chairman of the Central Military Commission of the Workers’ Party, but was expected to ascend to new military and political posts while being groomed to become the next leader.

Today’s reference to his new title was in commentary in the Rodong Sinmun newspaper, the mouthpiece of the Workers’ Party, urging soldiers to dedicate their lives “to protect the party’s Central Committee headed by respected Comrade Kim Jong Un.” The editorial called on the people to become “eternal revolutionary comrades” with Kim Jong Un, “the sun of the 21st century.”

The language echoed slogans used years ago to rally support for Kim Jong Il, and made clear the son is quickly moving toward leadership of the Workers’ Party.

North Korea refers to Kim Il Sung as the “sun” of the nation and his birthday is celebrated as the “Day of the Sun,” and state media have sought to emphasize Kim Jong Un’s role in carrying out the Kim family legacy throughout his succession movement.

His titles are slight variations of those held by his father, but appear to carry the same weight.