TOD: I remember a wonderful sitcom that didn't last long called "The Associates," which featured four promising young actors as new attorneys (Martin Short, Ally Walker, Joe Regalbuto and Shelley Smith) plus the elder partner, Wilfred Hyde White.
Attorneys never go out of style, unfortunately; and humorous ones are in ever in short supply.
I could see getting unknowns for the parts, but it would also be fun to try Anna Kendrick in the Ally Walker role, Hunter Parrish or Matt Lauria in Short's role, Michael Cera in Regalbuto's part and, in a bit of blind casting, as a brainy black attorney Jurnee Smollett instead of the not-so-dumb blond Smith. He's not old enough to take over as a substitute for White, but John Malcovich could play intelligent enough and certainly off-the-wall enough to make a disarming senior partner.