Which stars would you cast for the main characters for a movie to be made of Jerome's Three Men in a Boat?

This consideration is a matter of personal preference. My tendency is to go with an American cast and to cast a comedic group we’re already familiar with. Three options come to mind. First, is the cast of Seinfeld. Jerry Seinfeld could be J., the narrator; Jason Alexander (George) could be George; Michael Richards (Kramer) could be Harris; and Wayne Knight (Newman) could be a human playing Montmorency, the dog. Or Richards and Knight could...

This consideration is a matter of personal preference. My tendency is to go with an American cast and to cast a comedic group we’re already familiar with. Three options come to mind. First, is the cast of Seinfeld. Jerry Seinfeld could be J., the narrator; Jason Alexander (George) could be George; Michael Richards (Kramer) could be Harris; and Wayne Knight (Newman) could be a human playing Montmorency, the dog. Or Richards and Knight could switch these roles convincingly. A second option is the cast of Friends. Matthew Perry (Chandler) could be J.; David Schwimmer (Ross) could be George; Matt LeBlanc (Joey) could be Harris; and James Michael Tyler (Gunther) could play Montmorency. Or LeBlanc and Tyler could switch these roles. My third recommendation is the cast of Big Bang Theory. Jim Parsons (Sheldon) could be J.; Johnny Galecki (Leonard) could be George; Simon Helberg (Howard) could be Harris; and Kunal Nayyar (Raj) could play Montmorency. Or Kevin Sussman (Stuart) or John Ross Bowie (Barry) could play Montmorency. What would be even more fun would be to mix these actors up into different groups, and give them uncharacteristic roles to play. Isn’t it interesting that these casts already somewhat mirror similar characters in this book?