Collin Gosselin Expresses Gratitude to Dad Jon 

Collin Gosselin announces his plans for the future after high school graduation.

He shares a heartfelt Instagram post revealing his enlistment in the military.

Collin expresses gratitude towards his sister Hannah and his father Jon for their support.

He also acknowledges the positive influence of his father's ex-girlfriend, Colleen Conrad.

Collin thanks his Army Junior ROTC instructors for the valuable lessons they taught him.

The Gosselin siblings rose to fame on the reality show "Jon & Kate Plus 8."

Collin and Hannah live with their father, while Kate has custody of the other children.

Jon confirms that Kate attended the graduation at their daughter's invitation.

Jon remains estranged from the other four sextuplets and twins Mady and Cara.