"Is that that Seth Rogen guy? What's he doing?"
"I think he's... acting."
"Acting? You mean actually giving a performance without using immature fart or stoner humor as a crutch to compensate for an apparent lack of talent? Well, I'll be... Do miracles never cease?"
Seth Rogen is, indeed, quite good in this. The scene where he expresses, in various takes, his shock and horror at his wife's infidelity is revelatory. Overall, though, "Take This Waltz" is so-so, marred by a lack of likable characters and consistent dialogue.
I there's one thing you can say about this movie, it's that it doesn't glorify the act of adultery in any way. Bored housewife Margot (Michelle Williams, who gives a very nice performance here) engages in cutie pie antics and baby talk with her husband, Lou (Seth Rogan,) but longs for passion and intimacy.