07/28/2008 at 03:00 PM EDT
Actress Maria Bello and boyfriend Bryn Mooser are engaged, her rep confirms to PEOPLE.
The Mummy: Tomb of the Dragon Emperor
star, 41, and Mooser, 28, a writer, announced their engagement in Bello's hometown newspaper, The Norristown Times Herald
, in Norristown, Pa, which said the couple "fell in love over a sheer passion of politics, Africa and cryptozoology."
Bello told the New York Post
's Page Six Magazine
she "was always anti-marriage. I didn't understand monogamy. I couldn't figure out how that could last. And then I met Bryn and I started to understand the beauty of constancy and history and change and going on the roller coaster with someone – of having a partner in life."
Bello and Mooser have not set a date yet.