Jessica Alba participates in the 'Climate of Change' panel. Photo: AP

Jessica Alba is tired.

The Hollywood wife and mother is not only making movies but also serving as a judge at this year's Tribeca Film Festival and working as honorary U.S. co-chair of 1GOAL: Education for All, a youth charity connected to the 2010 soccer World Cup.

But one day after lobbying legislators in Washington, D.C., the exhausted actress faithfully turned up to a New York screening of "Climate of Change," an environmental documentary premiering at the festival.

At a Q&A following the screening, moderator Perri Peltz (host of Sirius Satellie's "Doctor Radio Reports") asked Alba what it was like taking her message to Capitol Hill.

"Intense," replied Alba. "Politicians are grinding."

Much like celebrities that have you sit through a two-hour film about the environment and then don't give you the interview you were promised! Ha ha!

Meanwhile, read about a TV star who went nude for charity.