Yep. Richard Biggs was the first in May of 2004 followed by Andreas Katsulas in Feb of 2006, then Jeff Conaway in May of 2011 and then Michael O'Hare in Sep 2012.
Richard Biggs was the youngest at 44 followed by Andreas Katsulas at 59.
Jerry Doyle, Jeff Conaway and Michael O'Hare were all 60!!