They accepted the restaurant chain's offer to pay for their July affair on Monday.
"We are very appreciative of Burger King and can't thank them enough for their generosity!" said King.
It all started after their engagement in October. The couple had a little fun with the name coincidence and posed by a Burger King restaurant sign for a photo.
They were interviewed by reporter Dave Bakke of the State Journal-Register
in Springfield, the state capital.
Burger King got wind of the article and was immediately interested in the happy couple, tweeting for help to locate them.
They were invited on Skype on Monday to learn of a surprise: Burger King will pay for their whole wedding.
"We were shocked (and still are)," said King.
The fast food romance was many years in the making.
Burger, now 24, and King, 23, met in kindergarten and grew up together in New Berlin. In fifth grade, classmates Joel Burger and Ashley King were asked to stand as student council representatives during an assembly with a motivational speaker.
"He said our names to the school," King told CNN, "and then laughed and pronounced that together we were Burger King."
The motivational speaker wasn't too far off -- a merger was in the works.
The two became friends by high school, then dated in college.
When the time came to propose, "Joel took me out on his boat to go fishing, and he popped the question while we were on the water."
Burger King's message for the happy couple: "Congratulations, Joel and Ashley on falling in love your way."