"Counting On" season 4 is still running and has already featured several exciting events in the lives of the Duggars. Jessa Duggar-Seewald revealed in the trailer for TLC's season 4 that their family has been through some huge changes.

The engagement between Joy-Anna Duggar and long-time friend Austin Forsyth has been highlighted. His talk with the Duggar patriarch went smoothly although Jim Bob was caught surprised. The engagement was then announced by the pair and the whole family was so elated about the engagement.

Jessa revealed that Austin's parents asked him to "flip" five houses before marrying the Duggar daughter as per The Hollywood Gossip. He is now in his fifth house. It seems that the next season of "Counting On" will feature another wedding.

If the 19-year-old will marry her fiancé this year, she will be the youngest daughter to marry. Jill Duggar Dillard got married at 23. Jessa married Ben Seewald when she was 21. Jinger Duggar Vuolo recently got married at 22. Michelle Duggar, their mother married Jim Bob Duggar when she was barely 17 years old.

Jessa's delivery provided an exciting twist. Her husband Ben was quite nervous as his wife had a very difficult delivery with their firstborn son Spurgeon. Jill Duggar-Dillard announced her second pregnancy. Lately, Josh and Anna Duggar announced that they are expecting their fifth child.

Meanwhile, Jeremy and Jinger Duggar-Vuolo's wedding preparation was an interesting feature for the season. The whole family worked together for the wedding. Friends and churchmates were also very cooperative. The couple's life was followed after the wedding as they started life in Texas.

On the other hand, Joseph Duggar surprised fans with his and Kendra Caldwell's announcement of their courtship as reported by People. It is noted that Kendra's parents and the Duggars are friends and they belong to the same Christian denomination. In fact, she helped arrange the V-shaped floral arrangement at the altar on Jinger's wedding. Stay tuned for more exciting events in the lives of the Duggars. "Counting On" airs every Tuesday on TLC.