Hi Nancy, I don't have Millers in Monkton on my family list, but I found the following:
Mary Ann Miller b. 21 Sep 1824 Monkton AYR to Alexander Miller and Margaret McGlenathan
Mary Ann Miller m. 3 Oct 1845 to John Smith of Stewarton AYR
chldren: Martha Smith b. 21 Dec 1846 Stewarton
Mary Smith b. 11 Mar 1849 Stewarton
Agnes Smith b. 21 Jun 1851 Stewarton
4 other children born South Leith AYR, John, Adam, Sarah, Isabella in that order. E-mail me for more info.