Steve Martin's sad decline into mediocrity started here
Not all of his films pre-'Father of the Bride' were classics ('My Blue Heaven' being a prime example) but this was the one that really started his sad and on-going descent into middle-brow, upper-middle-class 'family/lifestyle' comedies. Prior to this utterly bland affair about the woes of being a very rich white family man and professional feeling pressured into giving his daughter the biggest wedding possible because her fiancé's family are even more hideously wealthy, Martin was more or less on a roll.
He started his film career doing 'wild and crazy' wacky comedies with Carl Reiner like 'The Jerk', 'The Man with Two Brains' and 'All of Me', and then moved on to more sophisticated character and verbal interplay comedies and comedy-dramas like the wonderful 'Roxanne', 'Dirty Rotten Scoundrels', 'Parenthood', 'Little Shop of Horrors', 'Planes, Trains and Automobiles' and even the underrated (and not as stupid as everyone says) 'The Three Amigos'. 'My Blue Heaven' was an unfortunate misstep, but at least it was a then fairly original idea which had the potential to be better. However, Martin did bounce back with 'LA Story' which harked back in part to his 'wild and crazy' late 70s/early 80s days...
...and then this. Sadly ever since I can count the number of half-decent Martin films on one hand (and apart from 'Bowfinger', his prematurely announced 'return to form', all of them are dramas).
Damn Charles Shyer and Nancy Myers and their middle-brow, middle-class, middle-aged, out-of-touch, and utterly unfunny brand of lifestyle porn comedy.