Saw the trailer at a local theater some time ago:
the main characters are a couple (with a cat i think?) and they are experiencing relationship problems and kind of a dullness in their live. The woman looked like Annie Clark . The couple kept repeating that they were already 5 years together and at one point the woman told an older woman about it in a dialogue with a meaning like this (roughly):
Woman: I don’t understand, we’re already 5 years together, I mean we’re not at the beginning anymore.
Older woman: 5 years is just the beginning.