Calista Flockhart ditches make-up for conservation conference

Happy couple: The pair gave wide smiles as they stood with their arms around each other at the event

The Ally McBeal star wore her short highlighted blonde hair unstyled and brightened her face with just a hint of lipstick.

Calista showed off her slender frame in an ocean blue dress reminiscent of coral and seashells.

The 48-year-old showed off her slender figure in the knee-length dress, which sported multiple black-and-white crisscrossing straps that flaunted the star's toned arms.

She added height to her 5ft 5in frame with gold-strapped cork platform heels.

Distinguished: Harrison looked dapper in a black suit and polka-dot tie as he posed with his famous wife

The mother-of-one smiled proudly as she put her arm around her famous husband's waist as the pair posed together prior to the event.

Harrison looked dapper in a black suit and polka-dot tie. At one point, the 67-year-old Indiana Jones star donned a pair of spectacles, and was seen bending down to retrieve his glass of red wine on the floor.

The action star serves on the board of the organization, which promotes environmental sustainability around the world. One of its primary focuses in Brazil is the conservation of reef-dwelling species that live nowhere else in the world, according to the CI website.

For a good cause: The couple were there to attend the conference held by the non-profit, which promotes marine conservation of rare reef-dwelling species in Brazil

Dutiful daddy: Harrison enjoyed some larks in the Rio water with the couple's son, Liam