This Sept. 13 MGM release has a laugh-out-loud funny trailer, a cute and sentimental premise and the wisdom of “old” Aubrey Plaza — “Be nicer to Mom,” “The only thing you can’t get back is time.”

Plaza as a profane, worldly and cynically wise mentor and spirit guide for young women? Totally down with that. Pairing up Plaza with “Nashville” alumna Stella? Inspired.