You're right, Tazber, the film belongs to the two men (though I think Adams made a big impression as Brenda, foreshadowing her Oscar-nominated turn in JUNEBUG and her star-making turn in ENCHANTED). Eve Jen Garner has a nifty cameo role that I think still matters for our understanding of the Leonardo DiCaprio role.
I would have liked seeing Erin Davie as Brenda though. I believe Gettelfinger was supposed to play the Jennifer Garner part, but I think she's out touring with Three Graces.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"