The magazine cited Hewitt's publicist, Sarah Fuller, who said she had no details on the couple's wedding plans.
An afterhours phone message left with Fuller was not immediately returned.
Hewitt also starred in the television series "Party of Five" and "Time of Your Life." Her film credits include "I Know What You Did Last Summer," "The Tuxedo" and "Garfield."
McCall has had small parts in the television series "Band of Brothers," "CSI:NY" and "Ghost Whisperer."