Only president to marry in the white house?

Grover Cleveland was the only president to have a White House wedding. John Tyler and Woodrow Wilson also got married while they were in office but the weddings were not held in the White House,

(Grover Cleveland was unmarried when he was elected, and married for the first time while in the White House. He was 49 and he got married to a 21-year-old woman.)
Grover Cleveland