Margot Hensler Phelps and Marcus Westley Wilkerson were united in marriage June 21, 2011, in Estes Park, Colo. Margot, daughter of Kay and Michael Phelps and granddaughter of Bill and Sue Hensler of Dolores, is employed by the California Institute of Technology as an optics engineer for the Laser Interferometer Gravitational Wave Laboratory. Marcus, son of Glen and Sandra Wilkerson of Austin, Texas, is employed by the Jet Propulsion Laboratory as I&T Lead and Flight Systems Engineer. The happy couple reside in their home in Altadena, Calif.