JOHN CLEESE TO GRACE WILL & GRACE THIS
John Cleese's assistant, Kim 'Howard' Johnson, wrote to tell us that Cleese will be doing six episodes of Will & Grace this season, playing Lestor Finster, the father of [Lorraine Finster,] the character played by Minnie Driver. He will also be the new romantic interest for Megan Mullally's character [Karen Walker].
Cleese will film the first two episodes in October, says Howard, and the remainder of his appearances should be scattered through the season. The budding and perverse romance between [Lestor and Karen] is going to span the whole season, Will & Grace executive producer Jeff Greenstein has been quoted as saying. 
It was the producers' admiration for Cleese's work that led to him being cast in the role. He's just a magnificent actor, and he knows funny, said Greenstein. In terms of the comedic rhythms of Will & Grace we're hyperverbal it just seems like the kind of comedy that he would naturally fit with. 
In explaining his commitment to the series, Cleese said that he agreed to do the role, ...partly because I like the show so much - I watch it with my daughter, it's her favourite show - and partly because it's directed by Jimmy Burrows, the only TV director I've ever worked with whom I'd seriously call a genius.  James Burrows, who is also an executive producer of Will & Grace, directed Cleese as Dr. Simon Finch-Royce in a 1987 episode of Cheers.