Kristel J. Kallstrom and Christopher R. Cosio have announced their engagement.

The future bride is the daughter of Susan and James Kallstrom, of Fairfield. Her fiance is the son of Alina and Raul Cosio, of Ridgefield.

The bride-elect graduated from Villanova University in 2007 with a bachelor's degree in sociology. She works in account management at Independent Doctors of Optometric Care in Norwalk.

The future bridegroom graduated from Villanova University in 2001 with a bachelor's degree in business and marketing. He is a strategic account executive for Gartner Inc. in Stamford.

The couple plans to be married May 9 at Greenfield Hill Congregational Church, with a reception to follow at St. Clements Castle in Portland.