Departing morning TV host’s Regis Philbin’s chair on Live! won’t have time to cool off before Jerry Seinfeld arrives as the first guest host of the post-Regis era. The popular weekday talk show is announcing that Seinfeld will join continuing co-host Kelly Ripa for three days, airing Nov. 21-23. The show said Tuesday that guests scheduled to join Ripa and Seinfeld are actor Jason Segal, actress Kim Cattrall, comedian-host Howie Mandel, “Naked Chef” Jamie Oliver and that fabulous Muppet, Miss Piggy.