Michael Douglas, 56, and Catherine Zeta-Jones, 31, tied the knot Saturday night at Manhattan's Plaza Hotel in front of some of the biggest names in Hollywood, including Jack Nicholson (reportedly with on-again, off-again love Lara Flynn Boyle), Anthony Hopkins, Christopher Reeve, Danny DeVito, James Woods, Goldie Hawn, Steven Spielberg, Oliver Stone, Brad Pitt and Jennifer Aniston. According to USA Today, Meg Ryan and Russell Crowe also were in attendance. Speaking of the tabloid's favorite couple, a rep for Ryan denies buzz that the actress is pregnant with the Gladiator star's baby.