A source tells ET that the private event with the couple's friends and family was held at The Addison Park in Keyport, New Jersey.
JWoww's Jersey Shore co-stars Nicole "Snooki" Polizzi, 27, Sammi Giancola, 28, and Deena Nicole Cortese, 28, stood by her side as bridesmaids. Vinny Guadagnino, Paul DelVecchio and Ronnie Ortiz-Magro were also in attendance.
A source tells ET that the guests wore black and traditional wedding attire, and the color scheme of the wedding appeared to incorporate a lot of black as well.
Jenni, 28, and Roger, 38, got engaged in September 2013 when Roger popped the question with a huge pink and white 5-carat diamond ring during a skydiving lesson.
Roger and JWoww announced on Christmas Day 2013 that they were expecting their first child, and the couple welcomed their daughter, Meilani Alexandra, in July 2014.
WATCH: Nicole Polizzi and Jenni Farley Talk Motherhood and Wedding Woes
The couple had a surprise in store for their wedding guests. JWoww and Roger announced that they're expecting their second child. Here's more on their baby announcement: