The couple will exchange wedding vows on Sept. 21 at Lindsey Street Hall in Chattanooga.
The bride-elect is the granddaughter of Jack and Jane Curtis of Beechgroove and Joe and Elizabeth Lay of McMinnville. She is the sister of Andrew Lay of Cleveland.
Miss Lay is a 2007 graduate of Walker Valley High School and a 2011 graduate of the University of Tennessee at Chattanooga. She is a member of First United Methodist Church of Cleveland.
Mr. Petcu is the grandson of Tilly Najjar and the late Victor Najjar and the late Julius and Pearl Petcu. He is the brother of Anna Sweeney of Franklin and Michael Petcu of Nashville.
The future bridegroom is a 2004 graduate of Father Ryan High School and a 2010 graduate of the University of Tennessee at Chattanooga. He is employed by Lee Company in Nashville. He is a member of Holy Trinity Greek Orthodox Church in Nashville.