"Twilight: Eclipse" Preparations Coincide with an Actual Eclipse

NEW YORK (CBS) Star-gazers - of both the astronomical and celebrity varieties - will be in for a treat this weekend.

A partial lunar eclipse is set to take place early Saturday morning, starting at 6:17 EDT. The moon will pass through the earth's shadow, temporarily becoming dark.

But if stars of the human variety are more to your liking, there's another sort of "Eclipse" taking place.

The third installment of "The Twilight Saga" had its premiere in Los Angeles on Thursday, and in anticipation of the film's release on June 30, Summit Entertainment and Moviefone are hosting free screenings of the first two films on Saturday.

Fans can watch "Twilight" and "The Twilight Saga: New Moon" at "Twilight Night" events in various cities. Each screening will include special cast appearances, along with red carpets, photo booths, live music and other activities.

Cities hosting the events are Vancouver, Toronto, Atlanta, Dallas, Denver, Miami, Philadelphia, Phoenix, Portland, Salt Lake City, St. Louis, San Diego, Seattle, and Washington. Fans will be accommodated on a first-come, first-served basis.

Click here for more information on "Twilight Night."