Reese Witherspoon’s Son Deacon, 18, Is So Grown Up In Gray Suit Heading To Prom: Photos

View gallery Image Credit: Chelsea Lauren/Shutterstock Prom season is here, and it looks like Reese Witherspoon‘s son Deacon Phillippe is an active participant! On May 21, the 18-year-old high schooler posted some Instagram photos of himself getting ready for the school dance. In the pictures, he posed in a gray suit and tie with a…