PHOTOS: Before Amal: A look back at George Clooney's ex-girlfriends

Get ready to say good-bye to the world's most eligible bachelor -- George Clooney is expected to wed his fiancee Amal Alamuddin this weekend in Venice, Italy.

Clooney proposed to Alamuddin, a British human rights lawyer, this past April. The two began dating last fall after meeting in Italy, where Clooney owns a home on the scenic Lake Como.

But before there was Alamuddin, Clooney was possibly the world's most famous serial monogamist, with a slew of girlfriends dating back to his previous marriage to Talia Balsam from 1989 to 1992.

Check out the gallery above for a look back at Clooney's past loves.