Jinger Duggar had 'no clue' boyfriend would propose

(TLC)

Jinger Duggar was clueless when it came to the timing of boyfriend Jeremy Vuolo's proposal.

The "Counting On" star's sister Jessa said of her younger sister in a clip from Us Weekly, "I don't think she has any clue what's coming."

Vuolo popped the question in New York City this July. The show covers the days leading up to the romantic proposal when the soccer player was busy planning.

"Jeremy is getting very excited as the day approaches, and he's trying to remain calm, though," Jessa told the camera. "I don't think he's appearing anxious outwardly, but he's remaining very calm, so Jinger won't catch on."

Also during the episode preview, Jinger said of her boyfriend during their trip in the Northeast, "Out of all the trips that I've taken in my life, I think that this is definitely one of the most memorable because it's been spent with my best friend, the most amazing person, gift from God."