John F. Kennedy's only grandson makes acting debut on 'Blue Bloods'

JFK's grandson, 25-year-old John Schlossberg was cast as Jack Hammer in the crime drama show, Blue Bloods. He said it was a dream come true.

Schlossberg took to Instagram on Saturday to share a behind-the-scenes photo with his 18,000 followers and revealed that he would appear in the season 8 finale.

'I don’t make the rules; I just pretend to enforce them — Cash [sic] me tonight on season 8 finale of Blue Bloods my dream come true!! Best show in the entire world.'

Jack Schlossberg, Instagram, May 12, 2018.

Schlossberg is the son of Caroline Bouvier Kennedy with Edwin Schlossberg. He is the only grandson of the 35th President of the United States, John F. Kennedy.

As reported by ET Online, Schlossberg studies law at Harvard and dreams of making his family proud by following in his grandfather's footsteps.

Jack values family tradition and has shown interest in the family business. People reported that he traveled with his mother to Japan where they visited orphanages in Fukushima.

Schlossberg got the public's attention when he co-founded ReLightNY at the age of 14. The initiative aimed to provide energy-efficient light bulbs to low-income housing developments.

Since then, Jack has graduated from Yale University where he obtained a degree in history. Like his grandfather and mother, he is passionate about politics and humanitarian causes.

That said, Schlossberg feels that he also wants to 'make his own way' in the world, and he still has plenty to 'figure out.'

A little-known fact about former president John F. Kennedy: he donated his presidential and legislative salaries to various charities.

JFK was shot on November 22, 1963, while his motorcade was driving through Dallas, Texas, and was pronounced dead thirty minutes after the attack.