The bride is the daughter of Robin Williams of St. Louis. The groom is the son of Charles and Terry Isenberg of Murrieta, Calif., and Anthony Mancini of Jupiter, Fla.
The bride was escorted by her grandfather, Robert Williams of Cape Girardeau.
Maid of honor was Sarah Riegle of New York, N.Y., and matron of honor was Kelly Guard of Cape Girardeau. Bridesmaid was Liz Kintz of St. Louis, cousin of the bride.
Jason Schwartz of St. Louis was best man. Groomsmen were Michael McNamara and Mike Otto of St. Louis. Usher was Jeff Schwab of St. Louis.
Flower girls were Alexandra Cappetta, cousin of the bride, and Sydney Gillott, cousin of the groom. Alexandra is the daughter of David and Kim Cappetta of St. Alban's Mo. Sydney is the daughter of Sean and Jennifer Gillott of Connellsville, Pa.
Maureen Daley of St. Louis attended the guest book.
The reception and dinner was held at Forest Park.
The groom's parents hosted the rehearsal dinner Oct. 20 at the home of the bride and groom.
Mrs. Mancini received a bachelor of arts degree from Webster University in 2004. She is a consultant with PracticeLink Ltd. of West Virginia.
The groom received a bachelor of science degree in business administration from Southeast Missouri State University in 1999. He is owner and president of Mid America Satellite and of Cobalt Communications, both in St. Louis.
After a wedding trip to Maui, Hawaii, the couple resides in St. Louis.