She performed Charlotte on "Sex and town" and Jenna on "Seinfeld." Who's she?

She made waves in "American Pie" and on her episode of "Seinfeld." Can you match this actress to her title? American tv host and comic, David Letterman is recognized for hosting the "Late Show with David Letterman." On the episode of "Seinfeld" entitled 'The Abstinence,' he visitor starred as himself.
Known for playing Dr. Lawrence within the film, "Saw," who is that this man who acted as David Lookner of "Seinfeld"? British actor, Cary Elwes, starred as Dr. Lawrence in "Saw." He can be known for his roles in "The Princess Bride" and "Robin Hood: Men in Tights." Within the "Seinfeld" episode, 'The Wait-Out,' he portrays David Lookner, a man who waits to be married to Elaine.
On the "Seinfeld" episode, 'The Summer of George,' she played Lanette. This man, who normally stars on "The Blacklist," made an appearance in the Seinfeld episode, 'The Apology.' Who is he? In the episode, 'The Keys,' she seems as herself, star reporter Murphy Brown. She's a "Murphy Brown" star and appeared on the "Seinfeld" episode, 'The key.' Can you inform us the title of this talented actress?