The cast of Seinfeld will finally be reunited after 11 years on a special finale episode of Larry David’s Curb Your Enthusiasm

Jerry Seinfeld, Julia Louis-Dreyfus, Jason Alexander and Michael Richards have not appeared onscreen together since 1998 but will reunite for the show’s season finale.
Members of the case will appear separately in five episodes of the show, where the characters will play themselves negotiating a Seinfeld reunion show, which will be the main theme of the new season of Curb Your Enthusiasm

MrDavid said the idea had been in the pipeline for years, but said the Curb Your Enthusiasm episode would not show the entire Seinfeld reunion episode the cast are supposedly filming.
He said: "We'll see the read-through, parts of rehearsals, the show being filmed. You won't see the entire mock episode."