LOS ANGELES (Variety.com) - MacGillivray Freeman Films has tapped Ewan McGregor to narrate "Humpback Whales," its underwater 3D adventure documentary for Imax and other giant-screen theaters.

The films is directed by Greg MacGillivray ("The Living Sea," "Everest"). The film, presented in association with Pacific Life, will be released Feb. 13 in about 20 markets.

The film explores the lives of the 55-foot, 50-ton aquatic mammals, who were very nearly hunted to extinction and are in the midst of a slow recovery. It's the company's first entertainment-focused film exclusively centered on whales.

"We hope the film excites and inspires people to better understand the humpback whale, as this mammal is critical to the ecological health and survival of the ocean," MacGillivray said.

"Humpback Whales" is produced by Shaun MacGillivray, and written and edited by Stephen Judson with a musical score by Steve Wood.