Christopher Reeve's Children Step Out for Father's Cause
09/08/2011 AT 02:05 PM EDT
The children of the Superman star are all grown up – and continuing their parents' fight to find a cure for spinal cord injuries.
Matthew Reeve, Alexandra Reeve Givens and Will Reeve all attended The Christopher & Dana Reeve Foundation "Night for a Cure" gala in Manhattan on Wednesday and turned heads for their good looks and good deeds.
"It's unbelievable," Matthew, 31, told PEOPLE of the research the foundation funded that recently helped paralysis victim Rob Summers, 25, stand and walk again. "My dad would have said, 'Sign me up.' "
Matthew, Reeve's son with longtime girlfriend Gae Exton, is now a grad student at New York University studying film and business.
Reeve's daughter with Exton, Alexandra, 27, is a counsel with the Senate Judiciary Committee. She wed her college sweetheart, Garren Givens, in 2008.
Will, Reeve's 19-year-old son with wife Dana Reeve, is a sophomore in college.
Christopher Reeve, who turned into a real-life superhero when he became an advocate for spinal cord research after a near-fatal riding accident in 1995, died at 52 of heart failure in 2004. His wife Dana, who proudly took up the cause, died of lung cancer at 44 in 2006.