Kathy Hutchins / Shutterstock.com | Inset: Public Domain
When it comes to Hollywood marriages, long-lasting love stories are rare. But Maureen McCormick—best known for playing Marcia Brady on The Brady Bunch—and her husband, Michael Cummings, are celebrating four decades of marriage, and they say the secret is actually pretty simple. “You’ve got to have a sense of humor about things,” Cummings told People…