You read that title right. Geum Jan Di's little brother (actor Park Ji Bin) is all grown up and ready to serve his mandatory military service. The now-20-year-old actor officially enlisted as an active soldier on May 26, 2015.

Park, best known for childhood roles in Yi SanBoys over Flowers, and Stars Falling from the Sky, to name a few, has expressed a desire to get his 2-year military service done early. When he initially announced that he would be enlisting on May 26, he said that he wanted to serve early and return with a more mature image. It's not a bad move for a child actor looking to transition into more adult roles. It also means that he won't have to take a break from acting later in his career.

The actor initially planned to enlist last year, but his father's death in June pushed back the enlistment date. After finishing his contract with Keyeast and recently attending his sister's wedding, he was able to enlist without any outstanding obligations.

Park Ji Bin said goodbye through a series of Instagram photos. On May 25, he posed with his friend, actress Kim Bo Ra, thanking her for a gift she gave him. 

On May 26, he gradually revealed his new military haircut through a series of selfies:

Best of luck, Park Ji Bin! 

You can see Park Ji Bin in his most recent series, The Suspicious Housekeeper:

Sources: 12