American reality television series, Duck Dynasty that portrays the lives of the Robertson family, shot its 100^th episode last week and one of the show's star, 18-year-old model and author Sadie Robertson celebrated the milestone posting about it on her Instagram account.

She wrote on her Instagram account, @legitsadierob, "Seriously cannot believe we just finished filming our 100th episode. We are so thankful for our fans who have carried us this far and stood for having some good clean fun on TV. It's been so fun. We love every single one of ya. 8.13.15"

Fans of the show and Sadie also showered the post with congratulations. One follower, @veganrawesomeness commented, "Great to have a show where it's always closed with prayer!"

While another user, @marylu531, said, "Hi Sadie we just finished watching the Hawaiian vacation episode. Our family is a big fan of yours."

Last week, Sadie said she was excited to once again walk the runway at New York Fashion Week to promote her new line of "daddy-approved" prom dresses with designer Sherri Hill. She wrote on her Instagram account, "Throwback to New York fashion week - I'm so excited its exactly one month from today until I walk the runway again."

Last year, Sadie modeled two beautiful gowns from her line during fashion week. At the time, she shared photos from the event and included the caption: "So extremely blessed to be a Sherri Hill model & get to walk in New York fashion week. Praising God for all the many opportunities. ALL glory to God. Walking for him!"

Humphreys to Guest in Duck Dynasty

Meanwhile, Ronnie and Ryan Humphrey will again appear on the Duck Dynasty series, reported The Times. Ryan won second place in the 2014 NASCAR track championship points standings and is also second in the NASCAR state championship standings. His record in the racing scene includes one win, 10 top five finishes and one pole qualification.

Executives at A&E invited Ronnie and Ryan to appear on the Duck Dynasty show to provide some pointers in an episode titled Pit Perfect, which will be shot at Revolution Park Speedway in Monroe.

Ronnie commented on the invitation, "I wouldn't take anything for getting the opportunity to do that. The Robertsons are so genuine and good, Christian people who are fun to be around."

"We shot it all in one day and it was pretty crazy," he went on to say. "But I can verify that Si Robertson does drink tea all day and his wife makes it for him every morning."

Jase Robertson complimented Ronnie and Ryan for agreeing to guest on their show despite minimal financial gains. Ronnie said, "Jase kept saying out of all the shows they have shot, this was the second most fun show to shoot, because a lot of them are kind of ho-hum. But that made me feel good to hear him say that.

"He never said what the most fun one was."

Duck Dynasty is a popular A&E series that focuses on the Robertson family who became wealthy from their family-operated business, Duck Commander. The West Monroe, Louisiana business makes products for duck hunters, primarily a duck call called Duck Commander. The Robertson men - brothers Phil and Si, and Phil's sons Jase, Willie, and Jep - are known for their long beards and their Christian views. The family was previously featured on the series Benelli Presents Duck Commander and its spin-off Buck Commander, which still airs on the Outdoor Channel.