Los Angeles: Former US President John F Kennedy's grandson Jack Schlossberg is making his acting debut in the show "Blue Bloods".

The 25-year-old actor will be making an appearance as Officer Jack Hammer in the season eight finale of the crime show which airs on CBS.

"I don't make the rules, I just pretend to enforce them ? Cash me tonight on season eight finale of Blue Bloods my dream come true!! Best show in the entire world," the actor wrote on Instagram.

Schlossberg also shared a picture from the sets of the show, in which he is standing in police uniform, posing with his mother, Caroline Kennedy, and other cast members.

In another photo, the actor can be seen pointing at a sign that reads: "Officer Jack Hammer".

Image source: Instagram