John Henderson and his wife Charlotte are the oldest living couple in the world.

Together, the Austin, Texas couple have a combined age of 211 years, according to Guinness World Records. John is 106 and Charlotte is 105. Dec. 15 will mark their 80th year of marriage.

The couple are college sweethearts, first meeting in class at the University of Texas in 1934. John was a guard for the football team while Charlotte was in school to be a teacher. They wed soon after they met, in 1939 during the Great Depression. CNN reports that they only spent $7 on the hotel room for their honeymoon.

John is also the oldest living former UT football player. For the last 84 years, he’s made it a tradition to go to at least one Longhorn football game every year. Both are still healthy and active—John exercises every day. Ten years ago, they moved to a senior living community associated with UT.

When asked what’s the secret to a long life and happy marriage, John told CNN, “Live life in moderation and be cordial to your spouse.”