United Kingdom, Aug. 26 -- Harrison Ford works hard at "maintaining" and "nurturing" his relationship with Calista Flockhart.

The Indiana Jones star, 83, has been married to the 60-year-old actress since 2010 and he's insisted he still enjoying the delights of being in love now he's in his 80s.

During an appearance on NPR's Wild Card with Rachel Martin, he explained: "Old people can love, too. You know, you think about falling in love and all of that business.

"You think it's the business of youth or something, you know, and staying in love is the issue."

Harrison went on to add the secret to his healthy marriage is "maintaining, nurturing, basically, not f****** up."

The actor was previously married to Mary Marquardt between 1964 an...