08/09/2010 03:54 pm ET | Updated Jan 17, 2013

John Travolta & Pregnant Kelly Preston, Jenna Elfman & Buzz Aldrin Party For Scientology (PHOTOS)

The Church of Scientology Celebrity Centre had a 41st Anniversary party at the Celebrity Centre in Los Angeles Saturday night.

In attendance was the Travolta family, including pregnant Kelly Preston and daughter Ella, actresses Jenna Elfman and Erika Christensen, 'Simpsons' voice Nancy Cartwright, and astronaut Buzz Aldrin and his wife Lois.