Lighthearted, surprisingly funny and buoyed by poignancy and punch lines, The Switch is a love story that starts with a partner-less pregnancy, and ends with warm fuzzies, after an unusual route.

Jennifer Aniston stars as Kassie, our pretty, successful and even-tempered heroine who opts for artificial insemination when, in her mid-30s, she’s single but still wants to be a mom. Things are going swimmingly until her bestie Wally (Jason Bateman) boozes it up at her pregnancy party, and  -- whoops! -- switches his sperm for the original batch. Suddenly, Kassie’s baby-to-be will be infused with the neuroses and social awkwardness that besets her hapless BFF, instead of alpha-male attitude from a strapping blonde named Roland (Patrick Wilson).