It was no-frills casual for the star and Calista Flockhart at their June 15 wedding

Credit: Richard Young/Startraks

Who needs an Armani tux? When Harrison Ford married longtime girlfriend Calista Flockhart on June 15, the movie star opted to tie the knot in more offbeat designer duds: Wrangler jeans.

Completing the laid-back approach to their surprise Santa Fe, New Mexico, nuptials, Flockhart donned a casual white sundress for the outdoor ceremony on the grounds of Gov. Bill Richardson’s hilltop mansion.

Flockhart’s son, Liam, 9, served as ring bearer as the couple exchanged bands and simple vows. Looking on were Gov. Richardson, who performed the simple ceremony; his wife, Barbara; the governor’s official counsel; and New Mexico’s chief justice, Charles W. Daniels, who officially pronounced Ford, 67, and Flockhart, 45, husband and wife.

The intimate, no-frills wedding underscored what those close to them have long known: Ford and Flockhart are in it for the long haul.

“They’re both honest in their approach to life and to each other,” says Bernie Pollack, a Ford pal and his longtime go-to costume designer. “This [marriage] will only enhance what they already had.”

Ford, who is in New Mexico shooting the action-fantasy Cowboys & Aliens, had a day off from work for his wedding, but was back on-set a few days later.

For more details of the Ford-Flockhart wedding, pick up this week’s issue of PEOPLE, on newsstands Friday