'RHOA' alum Porsha Williams marries Simon Guobadia

Porsha Williams and Simon Guobadia tied the knot on Friday in Atlanta

Porsha Williams accidentally showed off her reception dress live

The couple's 250 guests - including many Bravolebrities - attended

The two had a Nigerian customs and local law and custom ceremony at the Four Seasons Hotel

The couple will say "I do" in an American celebration in front of 350 guests

Williams have a 3-year-old daughter, and Guobadia has five children from a previous marriage

They met on season 13 of "RHOA," when Guobadia was married to "friend" Falin Pina

She changed into different gowns by designer Tabik: one in royal blue and one in golden.