Actor Yoo Seung Ho began a four-day leave from active duty in the South Korean Army on Saturday.

"Yoo Seung Ho quietly left for a small reprieve on Sept. 14 to spend some time with his family," a representative for the actor told the website allkpop on Monday.

Yoo also reportedly visited a dentist in the Shinsadong neighborhood in Seoul during the short break, where he reportedly was cordial with staff.

The actor looked thinner and tanned, according to observers.

At age 19, Yoo has just crossed the six-month threshold of his mandatory military service, after enlisting back in March.

All eligible males between the ages of 18 and 35 must enroll for between 21 and 24 months of army service in South Korea (the length of mandatory enrollment changes depending on which branch of the military that they serve in).

Yoo is reported slated for an honorable discharge on Dec. 4, 2014.

Back in June, the 27th Division Recruitment Training Department reported that the actor was promoted to the rank of assistant instructor.

Yoo's management company confirmed the actor's rise in rank to the publication eNEWS.

"They say he′s becoming the ideal soldier, but actually he′s just doing whatever everyone else does," Yoo's rep said. "He will continue to do whatever is asked of him during his service."

A source close to the actor says he is happy that Yoo is doing so well.

"I′m thankful he′s been adjusting well to his life in the army," the source said. "I hope he returns as his healthy self after serving his duties."

Despite several offers for film roles, Yoo, who won Munhwa Broadcasting Corporation's Best Newcomer Award in 2009,  decided to join the army back in January.

The actor reportedly made the decision to enlist shortly following the conclusion of his television series "I Miss You" on January 17.

"Yoo Seung Ho has requested to be enlisted as quickly as possible after his drama was over," a source close to Yoo Seung Ho told the website Soompi shortly following the actor's announcement.

"He wanted to enter quietly and so rejected all CF offers that came in after the drama."

According to the source, the actor also rejected filming any promotional video clips before he left.

"Yoo Seung Ho thought it wasn't right to have his face air on TV while he was serving in the army," the friend of the actor said.

"But he feels apologetic toward the advertising companies."