Ron Miller and Diane Disney were married in a small church ceremony in Santa Barbara on May 9, 1954.
From Bob Thomas' An American Original: Walt Disney: "While posing for photographs, [Walt] stood on his tiptoes in an effort to shorten the gap between himself and his new six-foot-five-inch son-in-law. The wedding cake had the Disney touch: the two figures on the top depicted Diane in Levi’s, Ron in Bermuda shorts and bare feet—with a football helmet."
As told by Diane: "Once a gag man, always a gag man. Dad surprised us with some very unusual bride-and-groom figures on top of our wedding cake."
See more personal family photos, like the one above, here at The Walt Disney Family Museum.